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."