London: Actor Charlie Sheen is set to make an appearance at the MTV Movie Awards 2012 Sunday where he will pay tribute to party films and also announce the musical act `Wiz Khalifa`.
The former `Two and a Half Men` star was recently arrested for the possession of marijuana.
"Even though Charlie has cleaned up his act, he still has a sense of humour about his out-of-control days," E! News quoted a source as saying.
"It`s all going to be a really big party moment," another source added.
The bash, which will be hosted by comedian Russel Brand, will have Kristen Stewart present a section with her `Snow White and the Huntsman` co-star Chris Hemsworth.