Eddie Redmayne, currently to be seen playing Stephen Hawking, is Charlotte's guest today.
French composer Alexandre Desplat has won the Original Music Bafta award, beating off competition from Hans Zimmer.
Desplat said he was "very honoured", adding: "It all goes back to [director] Wes [Anderson]. Wes is unique - his world looks like nobody else's."
Desplat beat off competition from fellow nominees Mica Levi for Under the Skin , Hans Zimmer for Interstellar, Antonio Sanchez for Birdman and Johann Johannsson for The Theory of Everything.
Other winners included:
Eddie Redmayne, The Theory of Everything
Julianne Moore, Still Alice
Richard Linklater, Boyhood
The Grand Budapest Hotel Wes Anderson
Emmanuel Lubezki, Birdman
Outstanding British Film
The Theory of Everything
Patricia Arquette, Boyhood
JK Simmons, Whiplash