Zac Efron vanessazacengaged.jpg

People UK says Zac proposed to his live-in gf of three years, planning on making an honest woman out of Vanessa by tying the knot this fall.

A source tells the mag Zac and Vanessa are planning on getting Mauied. “The proposal was something Zac had been thinking about for a while. They are both really excited about the wedding - it will be a star-studded day. They fell in love with Hawaii while there for a friend’s wedding. And Vanessa wants to get married on a beach so it’s perfect.”

"Perfect," huh? Aren't they a little young?