The actors who almost appeared in 'Harry Potter' - Everyone knows ‘Harry Potter.’ Both the book and film series are huge parts of contemporary culture. The films introduced the world to the UK’s finest acting talent. However, which actors didn’t get a place on the ‘Harry Potter’ cast?

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Peter O’Toole - Legendary actor Peter O'Toole starred in films such as ‘Lawrence of Arabia’ and ‘My Favorite Year.'

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Peter O’Toole - O’Toole was considered for the role of Albus Dumbledore after the original actor, Richard Harris, passed away. However, producers were also concerned with O’Toole’s health. The role eventually went to Michael Gambon.

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J.K. Rowling - That’s right, J.K. Rowling herself almost showed up in the film series. The writer was considered for the role of Harry’s mother, Lily.

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J.K. Rowling - It didn’t work out in the end, and the role eventually went to Geraldine Somerville.

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Tim Roth - The late Alan Rickman impressed audiences worldwide as Severus Snape. However, the role could have been played by another actor entirely: Tim Roth.

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Tim Roth - Roth was apparently first in line for the role, but chose to work on ‘The Planet of the Apes’ instead.

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Kate Winslet - The ‘Titanic’ narrowly missed out on joining the ‘Harry Potter’ cast.

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Kate Winslet - Winslet was considered for the role of Helena Ravenclaw, a ghost who haunts Hogwarts. According to Hollywood.com, Winslet’s agent rejected the role on her behalf. Kelly Macdonald (right) and Nina Young played the role in two separate films.

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Ian McKellen - No stranger to wizarding roles, Sir Ian McKellen was another actor who was considered for the role of Albus Dumbledore.

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Ian McKellen - After Richard Harris died, he was offered the role. But knowing that Harris had been critical of his previous acting work, McKellen didn't feel it would be right.

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Robin Williams - Rubeus Hagrid was a role made iconic by Robbie Coltrane. However, the late Robin Williams also had a chance at playing the character.

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Robin Williams - Apparently, Warner Brothers had picked Williams as first choice. However, J.K. Rowling wasn’t happy with an American actor in the role.

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Tilda Swinton - Swinton almost swiped up the role of Sybil Trelawney, a quirky character who fit the actress’s style.

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Tilda Swinton - Scheduling conflicts prevented Swinton from joining the ‘Harry Potter’ cast. The amazing Emma Thompson took on the role instead.

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Hugh Grant - In ‘Chamber of Secrets’, Gilderoy Lockhart was played brilliantly by Kenneth Branagh. However, Hugh Grant was offered the role first, and even accepted it. So what went wrong?

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Hugh Grant - Yet again, it was scheduling conflicts that caused Grant to miss the opportunity.

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Rosamund Pike - Way before 'Gone Girl,' Rosamund Pike was hoping to join 'Harry Potter' as Rita Skeeter.

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Rosamund Pike - However, things didn’t work out, and the role eventually went to Miranda Richardson.

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Billy Connolly - The legendary comedian was considered for the quirky character, Xenophilius Lovegood.

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Billy Connolly - However, he decided to work on other films, such as ‘The Hobbit’ and ‘A Series of Unfortunate Events’ instead. Rhys Ifans stepped in to take the role instead.

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Naomi Watts - Naomi Watts missed out on playing Narcissa Malfoy, mother of the menacing Draco Malfoy.

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Naomi Watts - However, like Kate Winslet, Watts apparently had the role refused by her agent. Instead, Helen McCrory played the complex character.

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David Walliams - Talking with the Daily Star, David Walliams said he was “was offered a part, not a big part” in the ‘Harry Potter’ series.

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David Walliams - He didn’t reveal who he could have played, yet Walliams would have been a great addition to the magical movies.

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Robson Green - Now known for his ‘Extreme Fishing’ series, Robson Green almost scored a role in the ‘Harry Potter’ series.

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Robson Green - Green was apparently picked out for the role of Sirius Black by director Chris Columbus. However, Alfonso Cuarón handled the film with Black, and he picked Gary Oldman instead.

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Bob Hoskins - According to Popsugar, the late Bob Hoskins was considered for the role of Horace Slughorn.

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Bob Hoskins - Unfortunately for Hoskins, the role landed in the hands of Jim Broadbent.

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Liam Aiken - That’s right, the all-important of Harry Potter was not always for Daniel Radcliffe. Apparently, the role was offered to American actor Liam Aiken.

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Liam Aiken - However, it didn’t turn out well for Aiken. J.K. Rowling didn’t want the role to go to a non-British actor. Radcliffe was ultimately chosen for the lead role.

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