Since Jamie Lynn Spears is already mom to a 4-year-old daughter, Maddie, it's hard to believe she's only 21. But when Britney's little sister, who just announced her engagement to boyfriend of three years Jamie Watson, walks down the aisle, she'll still be a young bride.
Of course, plenty of other celebrities have tied the knot in their late teens or early 20s. Here are 25 who wed before the age of 25.
