Brad Pitt and Angelina Jolie

After eight years together—and six children—Brad Pitt and Angelina Jolieare officially engaged. Why the sudden decision? "It is a promise for the future and their kids are very happy," Pitt's manager told People.

Jessica Biel and Justin Timberlake

Justin Timberlake and girlfriend of four years Jessica Biel have finally announced their engagement. After being off and on for the past year, he popped the question with a custom-designed ring while the couple was on their annual vacation in Montana.

Drew Barrymore and Will Kopelman

Art consultant Will Kopelman popped the question to Drew Barrymore while vacationing in Sun Vally, Idaho with a ring by Graff. Though the pair never officially announced they were a couple, they have been romantically linked since February 2011.

Anne Hathaway and Adam Shulman

After three years of dating, actor Adam Shulman proposed to girlfriend Anne Hathaway in late November of 2011 with an emerald-cut diamond ring by Kwiat. “I’m enjoying myself very, very, very much,” the 29-year-old told InStyle of her relationship. “Happiness is a nice feeling."

Natalie Portman and Benjamin Millepied

The couple, who met on the set of Black Swan, announced their engagement, and her pregnancy in December of 2010. Benjamin Millepied, Black Swan's choreographer, picked out the perfect engagement ring for fiancee Natalie Portman. Jewelry designer Jamie Wolf told InStyle.com, "Ben was exceptionally thoughtful and dedicated and patient to make sure we had everything right...we wanted everything about the ring to speak to things that are important to Natalie."

Amy Adams and Darren Legallo

Actress Amy Adams and her longtime boyfriend, Darren Legallo, are officially engaged, according to People.com. The Enchanted star met Legallo in an acting class in 2001, and after a year of friendship, they began dating. Legallo popped the question with a diamond ring by French designer Jean Dousset, according to USA Today. "He's really special. I'm really lucky because he's not competitive with me. He supports and embraces my success as mine," the actress told Peoplelast year. The couple plans to marry sometime next year but has yet to set an exact date.