The model-turned-actress` boyfriend Scott Stuber proposed in front of her parents on May 20 after he flew the delighted older couple to Los Angeles to witness the event.
This will be the first marriage for the Sports Illustrated Swimsuit Issue cover star while 42-year-old `Love and Other Drugs` producer Scott was previously married to `Star Trek` actress Rachel Nichols.
The couple - who have been dating for a year-and-a-half - have not announced a wedding date.
Former `Las Vegas` star Molly, 38, has previously dated `Rabbit Hole` actor Aaron Eckhart, with the couple splitting in 2009, three months after Molly confirmed their relationship.
According to pals the notoriously private Aaron was furious after Molly appeared on Chelsea Lately`s late night chat show, smiling every time his name was brought up and later revealed they were dating.