• Martin, Steve Actor, comedian, former member of SNL source: On the back of a vegetarian cookbook that listed vegetarian celebrities

but

• thrue his "people" - Steve never was veg, not even close. - Marr, LA
  
  but.....
  
• I find it odd sources close to him say he's not a veggie - I read he was at Paul Mccartney's bbq once and declined to eat the "ham"burgers until paul told him that he's a vegetarian, too, and they were soy burgers.
• I heard Steve Martin himself say he was almost a vegetarian, that he didn't eat but shellfish. The interview aired a couple of years ago. - Laura, CA