Bafta said they are looking into a big security problem after someone who wasn't supposed to be there got onto the stage during the best film speech.
A man, who might make videos on YouTube, went up with director Christopher Nolan and the team from the movie Oppenheimer when they were getting their big award at the Bafta ceremony on Sunday night in London.
The man was wearing a smart black suit and stood next to actor Cillian Murphy while Emma Thomas, who is married to Nolan and helped make the movie, was talking for the team.
Bafta made it clear by saying: "A social media prankster was removed by security last night after joining the winners of the final award on stage we are taking this very seriously, and don't wish to grant him any publicity by commenting further." This man might not have been noticed at first because he walked up when Thomas asked the rest of the Oppenheimer actors to come up too, as she said: "Where are you?
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