Watkins joined mid-year last season, doing impersonations of Barbara Walters and “Today” co-host Hoda Kotb. Wilson joined in 2007-2008.
Jenny Slate and Nasim Pedrad are joining the cast next season.
Veteran Darrell Hammond is still negotiating for a return to the show, according to Variety.
“Saturday Night Live” kicks off its 35th season September 26.