John Travolta grabbed dinner with Hollywood exec Dick Cook Thursday and revealed his Mother's Day gift to wife Kelly Preston!

Watch the video to see what it is, and mum's the word, everyone - literally!

Kelly became a mom again in November of last year when baby Benjamin was born. John says Ben is "doing great."

John, Kelly and Ella Bleu will all star in the upcoming film Gotti: Three Generations, as members of the Gotti clan. John says making the movie with his wife and daughter is "awesome."

See what John is doing to prepare for the role after the jump!