Mary-Kate Olsen is definitely the twin who is getting more work of the two! She's set to guest star on Samantha Who? with Christina Applegate.
They're busy taping MK's episode now, and according to E!, she'll be playing someone who saves Samantha's character.
Mary-Kate has been making quite the comeback! Rumor is also buzzing that she just shot a new show with John Stamos, aka Uncle Jesse. Wonder what her other half Ashley is up to?
