In honor of Oxygen's upcoming series, Too Young to Marry?, we rounded up a list of 10 celebs who didn't waste much time tying the knot. Some couples grew from puppy love and blossomed into full-on families, like Hilary Duff and her hubby Mike Comrie, who now have a 1 year-old son, Luca. Other pairs? Not so much. Remember when Britney got married to that rando in Vegas back when she was 22? Yeah.... neither does she. And even though Reese Witherspoon and Ryan Phillippe had 2 children and lasted seven years together, Witherspoon has reportedly said in interviews that she was "way too young" at the time she got married. Scroll through the gallery to see our top 10 list, and stay tuned for more info on Too Young To Marry?, coming to Oxygen soon.