The actress, who divorced Sean Penn in 2010 after 13 years of marriage, is planning to tie the knot with the 33-year-old actor, who she has been dating since early 2012, reported People magazine.
A spokesperson for the 47-year-old actress, who has two children, Dylan, 22, and Hopper, 20, with her ex-husband, confirmed the news after the blonde beauty was spotted wearing an engagement ring at the opening of fashion designer Diane von Furstenberg's 'Journey of a Dress' exhibition.
The couple met while co-starring in the 2011 film 'Rampart' and they were first spotted looking very cosy in an Italian restaurant in Australia in February 2012.