It's incredibly hard to believe that the first movie of the Harry Potter series, Harry Potter and the Sorcerer's Stone, is turning 15 this year. I mean it can basically drive a car and stay out until 10 p.m.. But what's even more unbelievable is that seven more movies followed, the last one being released in 2011. So really, with a series that long, it's no wonder that there are actors you forgot were in Harry Potter.

Obviously, the major stars, you can list off with no problem. Daniel Radcliffe, Rupert Grint, Emma Watson. And even fan favorites, like Gary Oldman as Sirius Black and Robbie Coltrane as Hagrid are easy to remember. But what about the professors you saw sporadically through the series? Or the Gryffindors just starting out in the film industry that are now starring on prime time dramas? And let's be real, some actors played their character so well that you barely recognized them.

Harry Potter has been such a huge part of my life, that I feel like I know most of these characters as well as my own family. I can tell you all about the problems that Dean and Ginny had when they were in a relationship together, I know what haunts Professor Slughorn the most, and I know things about Professor Trelawney that even she doesn't know. But the actors that played those characters? Well, I forget them because they embodied their roles so well. But it's time to remind yourself of these 13 actors you forgot were in Harry Potter and give them a round of applause for bringing the magic to life.

1. Alfred Enoch (Dean Thomas)

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PASADENA, CA - FEBRUARY 05: Actor Alfred Enoch attends the 47th NAACP Image Awards presented by TV One at Pasadena Civic Auditorium on February 5, 2016 in Pasadena, California. (Photo by Alberto E. Rodriguez/Getty Images for NAACP Image Awards)

He may not have been a great match for Ginny Weasley, but Dean Thomas was still a top-notch Gryffindor. And his role was brought to life by Alfred Enoch, who you should recognize from ABC's How to Get Away with Murder.

2. Robert Pattinson (Cedric Diggory)

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NEW YORK, NY - MAY 18: Actor Robert Pattinson attends 'Heaven Knows What' New York Premiere at the Celeste Bartos Theater at the Museum of Modern Art on May 18, 2015 in New York City. (Photo by Grant Lamos IV/Getty Images)

He went on to become a sparkly, sullen vampire, but you might have forgotten that before Twilight, Robert Pattinson played the courageous Cedric Diggory, a Hufflepuff killed during the Tri-Wizard Tournament by Lord Voldemort.

3. John Cleese (Nearly Headless Nick)

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LONDON, ENGLAND - DECEMBER 07: John Cleese at BFI Southbank introducing two newly rediscovered episodes of comedy classic, At Last the 1948 Show (1967) at BFI Southbank on December 7, 2014 in London, England. (Photo by Danny E. Martindale/Getty Images)

Everyone loves the ghost of Gryffindor, Nearly Headless Nick, but many forget that he's portrayed by John Cleese, an incredible actor. Not only did he star in the Monty Python movies, as well as the hilarious Fawlty Towers, but younger viewers recognize his voice, particularly his role as The King in Shrek 2.

4. David Tennant (Barty Crouch, Jr.)

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LONDON, ENGLAND - SEPTEMBER 22: David Tennant attends the World Premiere of 'What We Did On Our Holiday' at Odeon West End on September 22, 2014 in London, England. (Photo by Anthony Harvey/Getty Images)

You Doctor Who fans totally forgot that your boy David Tennant dropped his sonic screwdriver to portray Barty Crouch, Jr. in Harry Potter and the Goblet of Fire didn't you? And if you're catching him in the hit Netflix series Jessica Jones, your mind is equally blown right now.

5. Bill Nighy (Rufus Scrimgeour)

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NEW YORK, NY - APRIL 29: Bill Nighy attends The 2015 Tony Award Nominees Meet And Greet at the Paramount Hotel on April 29, 2015 in New York City. (Photo by Slaven Vlasic/Getty Images)

Poor Minister Rufus Scrimgeour doesn't last long in Harry Potter and the Deathly Hallows, but the actor that portrays him is still busy. Bill Nighy has been in a ton of movies according to his IMDB page, but many should recognize him as Davy Jones in Pirates of the Caribbean: At World's End and, of course, as Billy Mack in Love Actually. Oh bugger.

6. Emma Thompson (Sybill Trelawney)

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BERLIN, GERMANY - FEBRUARY 15: (EDITORS NOTE: Image has been converted to black and white.) Emma Thompson attends the 'Alone in Berlin' (Jeder stirbt fuer sich) premiere during the 66th Berlinale International Film Festival Berlin at Berlinale Palace on February 15, 2016 in Berlin, Germany. (Photo by Vittorio Zunino Celotto/Getty Images)

Remember when I said some actors were unrecognizable as their Harry Potter characters? Emma Thompson is definitely one of them, which is why it's such a "duh!" moment to remember she was in the films as Professor Trelawney.

7. Gemma Jones (Madam Pomfrey)

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LONDON, ENGLAND - APRIL 19: Actress Gemma Jones arrives at The Old Vic Theatre for a gala celebration in honour of Kevin Spacey as the artistic director’s tenure comes to an end on April 19, 2015 in London, England. (Photo by Tim P. Whitby/Getty Images)

If you're a Bridget Jones fan (which should be all of you if I'm being honest), you recognize Gemma Jones as Bridget's mother, but did you forget she was Madam Pomfrey? Without her and those mandrakes, the series would've ended with Harry Potter and the Chamber of Secrets.

8. Jim Broadbent (Professor Slughorn)

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British actor Jim Broadbent poses for pictures on the red carpet upon arrival for the world premiere of 'Paddington' in London on November 23, 2014. AFP PHOTO / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)

Oh hi, Bridget Jones fans. I hope you're still here because I know that you totally forgot Jim Broadbent, Bridget's father, also played Professor Horace Slughorn in the Harry Potter films. You're welcome.

9. Luke Youngblood (Lee Jordan)

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PASADENA, CA - JANUARY 09: Luke Youngblood arrives at the Disney/ABC 2016 Winter TCA Tour at the Langham Hotel on January 9, 2016 in Pasadena, California. (Photo by Jerod Harris/Getty Images)

If you were a fan of the show Community, you might recognize this handsome guy as Magnitude. But did you forget that he was Gryffindor and quidditch commentator Lee Jordan?

10. Frank Dillane (Young Tom Riddle)

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BEVERLY HILLS, CA - JULY 31: Actor Frank Dillane speaks onstage during the 'Fear the Walking Dead' panel discussion at the AMC/IFC Networks portion of the 2015 Summer TCA Tour at The Beverly Hilton Hotel on July 31, 2015 in Beverly Hills, California. (Photo by Frederick M. Brown/Getty Images)

I'm not even going to lie. My mind was BLOWN when I remember Frank Dillane, the actor that portrayed young Tom Riddle in Harry Potter and the Half-Blood Prince. Yep, that's Nick from Fear the Walking Dead.

11. Shirley Henderson (Moaning Myrtle)

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Scottish actress Shirley Henderson arrives for the screening of 'Life during wartime' at the Venice film festival on September 3, 2009. 'Life during wartime' is in competition at the 66th Mostra Internationale d'Arte Cinematografica, the Venice film festival. AFP PHOTO / Filippo Monteforte (Photo credit should read FILIPPO MONTEFORTE/AFP/Getty Images)

More Bridget Jones connections! If you remember Jude, Bridget's best friend and Aunt Sophie from Marie Antoinette, then you should also remember Shirly Henderson's portrayal of our favorite Hogwarts ghost — Moaning Myrtle.

12. Dawn French (The Fat Lady)

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LONDON, ENGLAND - SEPTEMBER 14: Dawn French attends the press night of 'Photograph 51' at Noel Coward Theatre on September 14, 2015 in London, England. (Photo by Chris Jackson/Getty Images)

Whether you love her in The Vicar of Dibley, Coraline, or French and Saunders, I think we can all agree that Dawn French is amazing. But don't let her role as The Fat Lady portrait from Harry Potter be forgotten!

13. Warwick Davis (Professor Flitwick and Griphook)

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LONDON, ENGLAND - JANUARY 21: Warwick Davis attends the National Television Awards at 02 Arena on January 21, 2015 in London, England. (Photo by Anthony Harvey/Getty Images)

And finally, another unrecognizable actor that brought the magic to life. How could anyone forget that Warwick Davis not only played our favorite charms professor, Professor Flitwick, but he also played Griphook the goblin in the later films? Serious talent right there, Mr. Davis. Especially as he crosses over into another epic series with his role in Star Wars VII: The Force Awakens.

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LONDON, ENGLAND - JANUARY 21: Warwick Davis attends the National Television Awards at 02 Arena on January 21, 2015 in London, England. (Photo by Anthony Harvey/Getty Images)