Shia LaBeouf poses for a selfie Friday with students during his 24-hour stay in an elevator at EC English Oxford in Gloucester Green. Screenshot

Actor Shia LaBeouf is taking part in his latest piece of performance art Friday by spending 24 hours in an elevator at Oxford University in England. He was expected to speak Friday evening at the Oxford Union debating society, and his time in the elevator marks the 24 hours on either side of his speech.

The Oxford Union is airing a live stream of the act, which it says functions as an “extended 24 hour talk.” LaBeouf is joined by his two art collaborators Nastja Rönkkö and Luke Turner in the elevator at EC English Oxford in Gloucester Green.

While the trio remains in the elevator, visitors can join them inside and may address the artists and the internet. The live stream’s description said the voices of anyone who enters the elevator will “form an extended, expansive and egalitarian Oxford Union address.”

You can watch LaBeouf and the other artists below.

LaBeouf’s performance began at 9 a.m. GMT and will continue until 9 a.m. GMT Saturday. Speaking to students in the elevator earlier Friday, he said he was invited by the president of the Oxford Union after he took part in a piece of performance art in Liverpool last year.

“Stuart the president said, ‘Do you want to stand in the same spot as Malcolm X?’” LaBeouf explained, according to the BBC. “Who [...] am I to argue with that?” he added.

The American actor who is known for his roles in the "Transformers" movies and in “Indiana Jones and the Kingdom of the Crystal Skull” has taken to participating in many performance art pieces in recent years. Last November he sat through a public screening of his entire film career for a project titled #ALLMYMOVIES in New York, and in December he sat in a gallery in Liverpool and asked strangers to call him on a publicly displayed telephone number for a piece called #TOUCHMYSOUL.

His latest elevator stunt is called #ELEVATE and so far has mostly involved LaBeouf and his collaborators chatting with university students. On Friday morning, he occasionally gave students hugs and took selfies with those that entered the elevator. His formal speech at the Oxford Union was scheduled to take place at 8 p.m. GMT or 3 p.m. EST, after which he is set to return to the elevator.