View photos George Cando. The Olsen twins' initial claim to fame came more than two decades ago when they starred as Michelle Tanner in the hit TV series Full House. GC Images The couples were sat close together at the game and put on affectionate displays throughout the evening. Mary-Kate Olsen got engaged to her year-old boyfriend of nearly two years, French banker Olivier Sarkozy last month, while vacationing in Jamaica And now, it seems, Mary-Kate had a very good excuse for forgetting her younger sibling's birthday. A bit on the eccentric style, they have been spotted wearing faux fur, lots of pearls and even an abundance of black lace. But from their public displays of affection it appears their relationship is more than sibling rivalry.