British comedian Russell Brand and actor Charlie Sheen address each other with pets names Genius One and Genius Two respectively.
The two bonded last year when Sheen got fired from the sitcom Two And A Half Men, and have since been good buddies.
"I got an answer phone message, 'Brand. Genius One. This is Genius Two'. I thought, 'This is crazy'," thesun.co.uk quoted Brand as saying. "There were instructions to go to his house. There was him being Charlie Sheen - which was out of control - sat with a bunch who looked really on the edge," he added.
Brand recently invited Sheen to join his yoga classes.