Actress Maggie Grace and director Matthew Cooke are engaged.

The Lost star took to Instagram.com to post a picture of the loved-up pair and announce the news in a romantic caption.

She writes, "The minute I heard my first love story, I started looking for you, not knowing how blind that was. Lovers do not finally meet somewhere. They are in each other all along... Matthew Cooke & I are so excited to share our engagement with you guys! I could not feel more grateful to share my life with this incredible man."

The How to Make Money Selling Drugs filmmaker also posted on the photosharing site, writing, "She said yes! Happiest, luckiest man in the world."

Grace previously dated her Lost co-star Ian Somerhalder, who is rumored to be engaged to Nikki Reed.