Actor Matt Damon says he's begun sexting his Liberace biopic co-star Michael Douglas.

The 66-year-old Douglas is preparing to play flamboyant pianist Liberace opposite Damon, who'll play the part of Scott Thorson, Liberace's alleged lover.

Acclaimed director Steven Soderbergh will direct the film based on a script by Richard LaGravenese, which is based on Thorson's book Behind the Candelabra (My Life With Liberace.)

Filming is expected to begin in May or June, and Damon told Access Hollywood it's never too early to begin preparing for his role.

The 40-year-old Damon joked that he and Douglas have been sexting each other.

“You gotta build up to these things, you don't want to just jump right in,” he said. “I'm warming him up a bit.”

Damon added that Douglas would become Liberace: “It's going to be a good one. I can see Michael doing it, he's going to be great!”

Already filming is the Clint Eastwood-directed J. Edgar, which stars Leonardo DiCaprio as FBI director J. Edgar Hoover and Armie Hammer as his alleged lover.

Damon stars opposite Emily Blunt in The Adjustment Bureau, which opens on March 4.