The Iron Man star, who announced in August that he is expecting a child with his wife producer Susan Downey, revealed that she has banned him from talking about anything related to the baby.
"I am under strict orders to discuss neither," Robert told E! Online. "But you got the cats' names."
The couple recently adopted two cats.
"We sort of rescued them from a bush in West Hollywood that a friend of ours found," Susan said.
"Their names are Montgomery and Dartanian," Robert added.
Over the weekend, Robert asked Hollywood to forgive Mel Gibson, saying that the Lethal Weapon star supported him when he struggled with sobriety, telling him not to give up hope.