John Stamos Thought ‘Full House’ Costar Lori Loughlin Wasn’t Tough Enough to Play Aunt Becky

He also had a (playful) grudge against Loughlin stemming from the 1983 Daytime Emmy Awards. To quote Stephanie Tanner, “How rude!” John Stamos admitted at a recent fan convention he initially thought Full House costar Lori Loughlin wasn’t tough enough to play Rebecca “Aunt Becky” Donaldson, the love interest and eventual wife of his Jesse Katsopolis, on the 1990s sitcom.