Gary Oldman is close to signing to star as Beethoven in “The Immortal Beloved,” to be produced by Mel Gibson, Bruce Davey and their Icon Prods.The script, written and to be directed by Brit Bernard Rose (“Paperhouse, “”Chicago Joe and the Showgirl”), is described as a thriller set at the end of the composer’s life that delves into the mystery of his genius. Gibson and Davey commissioned Rose to write the script and are in the process of shopping it to distributors. Oldman, whose career began in Britain, is filming “Murder in the First,” a Le Studio Canal Plus/Mark Rocco film that stars Christian Slater, Kevin Bacon and Embeth Davidtz. Warner Bros., whereIcon has a production deal, will handle domestic distribution on “Murder.” Neither Oldman’s agent, Rick Nicita of Creative Artists Agency, nor his manager, Douglas Urbanski, returned calls. Davey, in Nashville working on the score of Gibson’s latest film, Warner Bros.’ “Maverick,” also did not return calls.