Martin LaTierri, more commonly known as Sonny, is a character from Grease and a member of the T-Birds. His girlfiend is Marty Maraschino. In the 1978 movie, he is portrayed by Michael Tucci, in the 2016 live performance by Andrew Call, and in the 2017 play version by Alex Coppleman (alongside his co-star and singer, Tanya Thurlby whom played Coppleman's love interest).
Sonny is the funny smartass T-Bird, he likes to joke around. He has a crush on Marty but she doesn't seem to reciprocate until the end of the movie.
Sonny is a stocky young guy, curly hair, cocky grin.
Sonny Geez! Every teacher I got this year has flunked me at least once!
Sonny Rizzo got a bun in the oven
—Sonny, Drive-in theater
Danny I was hanging around down the beach, you know. You know.
Sonny I know what you mean, it's tough with all those chicks hanging around you.
Putzie Yeah, well, the only thing that hangs around you, Sonny, are the flies.
Sonny Hey, right here, Putzie, huh?!