Mikhail Gorbachev
Mikhail Gorbachev

Tom Hanks, Leonardo DiCaprio and former Soviet Union president Mikhail Gorbachev will be collaborating on HBO film "Gorbachev," chronicling the last years before the Soviet Union's fall. Hanks and DiCaprio will both be taking on executive producing roles.

John Shiban ("Hell on Wheels") is penning the script. Per Deadline, the film came together via DiCaprio's relationship with the famous leader; Gorbachev had appeared in his documentary "11th Hour."

Jennifer Killoran, Gary Goetzman and Keith Addis are also signed on as executive producers.

No word yet on casting.