Mary-Kate Olsen Joins 'Samantha Who?'
“She started today,” an on-set source says. “And she’s terrific.”
MK, 22, is set to play a character whom Samantha (Christina Applegate) tries to “save.” Her cameo will air this fall.
And if you remember, last fall, Mary-Kate played “good Christian girl” Tara Lindman on the Showtime series Weeds.