According to friends of the 30-year-old actor, the decision to pop the big question came when he learned that his best pal LEONARDO DiCAPRIO's romance with Gisele Bundchen had fizzled out.
A source says, "Leo is still down about losing Gisele, and he told Tobey that if he really loves Jen, he should step up to the table and not twiddle his thumbs about marriage.
"He told me he absolutely wants to marry Jennifer in the coming year. He doesn't want to lose her! I think she'd marry Tobey in a second!"
Meyer, 28, is the daughter of Universal Studios president RON MEYER.