Harry Potter stars Warwick Davis and Mark Williams have joined a gaggle of famous faces to celebrate the launch of the new Hogwarts Express attraction at the Warner Bros Studio Tour.

The Voice host Emma Willis, Peaky Blinders star Cillian Murphy and Pussycat Doll Kimberly Wyatt and her baby daughter Willow were among the Potter fans who gathered on platform nine-and-three-quarters for the party at the studios in Leavesden, Hertfordshire.

Kimberly Wyatt pushes the luggage trolley with her baby girl Willow on Platform 9 3/4 at Warner Bros Studio Tour London (Fever PR)
Kimberly Wyatt pushes a luggage trolley with her baby girl Willow (Fever PR)

Olympic gymnast and former Strictly champ Louis Smith attended with new girlfriend, former The Only Way Is Essex star Lucy Mecklenburgh, who revealed she had planned to bring Louis for his birthday in April as he is a massive fan.

Louis Smith and Lucy Mecklenburgh get ready to board the Hogwarts Express (Fever PR)
Louis Smith and Lucy Mecklenburgh get ready to board the Hogwarts Express (Fever PR)

Guests were able to check out the train’s windows, which replay scenes from the films, and pose for pictures with the animal actors including Crookshanks the cat, Hedwig the owl and Scabbers the rat.

Emma Willis poses with an owl (Fever PR)
Emma Willis poses with an owl (Fever PR)

Warwick, who played Professor Flitwick and Griphook posed for pictures with Mark, who starred as Arthur Weasley, and James and Oliver Phelps who played his twin sons Fred and George.

Harry Potter stars Mark Williams, Oliver and James Phelps, and Warwick Davis (Fever PR)
Harry Potter stars Mark Williams, Oliver and James Phelps and Warwick Davis (Fever PR)

Other stars at the event – who were treated to glasses of Butter Beer – included ex-EastEnder Ben Hardy, TV presenter Ben Shephard, Collabro, Jaymi from Union J and Conor Maynard.

The Hogwarts Express and platform nine-and-three-quarters at the Warner Bros Studio Tour London – The Making of Harry Potter, opens to the public on March 19.