After Us Weekly exclusively revealed she's engaged, Mary-Kate Olsen showed off her huge engagement ring during an outing in New York City on March 3. Credit: Pacific Coast News

Now that's a rock! After Us Weekly exclusively revealed she's engaged, Mary-Kate Olsen showed off her huge new engagement ring from Olivier Sarkozy during an outing in New York City on Monday, March 3. See more pictures of her big bling.

The 27-year-old Full House alum flashed photographers a thick gold ring with a large center diamond. The bride-to-be, who hid her face behind her scarf, was joined by twin sister Ashley during her stroll in the Big Apple.

On Feb. 28, sources confirmed exclusively to Us that Olsen and French banker Sarkozy, 44, are engaged to marry. The couple has been dating for nearly two years, after taking their romance public in 2012.

This will be Olsen's first marriage, and Sarkozy's second. He is dad to kids Julien, 12, and Margo, 10, with ex-wife Charlotte Bernard.