By Hillary Busis
March 02, 2011 at 07:04 PM EST

A free, outdoor screening of The Union, a documentary by Almost Famous director Cameron Crowe, will kick off the 2011 Tribeca Film Festival, fest organizers just announced. The film follows Elton John as he embarks on a collaboration with fellow music legend Leon Russell. After the premiere, which will take place on Wednesday, April 20 at New York’s World Financial Plaza, John himself will perform. The festival plans to announce the rest of its feature film slate on March 7 and March 14; the fest itself will run from April 20 through May 1.