Britney Spears, Hilary Duff, Reese Witherspoon and Kate Hudson are among the Hollywood celebrity moms, who became pregnant before the age of 25.
Britney Spears
The Pop princess gave birth to her first kid, Sean Preston, with husband Kevin Federline in 2005, when she was just 24 and at the top of her singing career.
One year later, Britney Spears continued to welcome her second son Jayden James Federline, and then got divorced from Kevin Federline.
The “I'm a Slave for You” star faced with most serious troubles in Feb. 2007, she even shaved her head and was sent to Malibu’s Promises rehab center, while her children stayed with their nanny.

Britney Spears said in an interview that she wanted her sons to have a “more normal childhood” than she had
Hilary Duff
American singer-songwriter and actress Hilary Duff stopped her fame as a teen star last year as she tied the knot with Canadian hockey player Mike Comrie in Santa Barbara, California, US. The couple announced via her official website on 14 August 2011 that they are expecting their first baby together.

Hilary Duff and her hubby Mike Comrie
Kate Hudson
The Golden Globe-winning actress got married to Black Crowes lead singer Chris Robinson in December 2000 as she was just 21. She gave birth to son Ryder at the ripe age of 24 and was separated from her husband two years later. She recently gave birth to second kid with boyfriend Matthew Bellamy.

“I’m so happy that I had a child so young. He is my buddy.” Kate Hudson told about her first kid Ryder
Ashley Simpson
Jessica Simpson’s younger sister, Ashley, announced she was pregnant with Fall Out Boy bassist Pete Wentz a few months after their wedding, and gave birth to son Bronx Mowgli Wentz at the age of 24. The couple got divorced just two years later, and the singer-actress sought joint legal custody and primary physical custody of their 2-year-old son.

After their divorce, Ashley Simpson and Pete Wentz “remain friends and deeply committed and loving parents to son Bronx”
Bristol Palin
American politician Sarah Palin’s daughter, Bristol Palin, announced she was pregnant with boyfriend Levi Johnston shortly after her conservative mother was in the 2008 presidential election. Bristol gave birth to Tripp Mitchell Easton Johnston few months before she and father of her son split in March 2009. Bristol Palin was ranked the third in the fall 2010 season of “Dancing with the Stars”.

Bristol Palin wrote that she felt “more like it was stolen” on losing her virginity to Johnston
Kendra Wilkinson
Hugh Hefner’s former girlfriend, Kendra Wilkinson, gave birth to her son Hank Baskett IV (not Hugh Hefner’s) as she was just 24. She and football player Hank Baskett got married at the Playboy mansion shortly after announcing Wilkinson’s pregnancy.

Kendra Wilkinson unveiled the first photos of her son to OK! magazine
Reese Witherspoon
Oscar-winning actress Reese Witherspoon gave birth to daughter Ava on 9 September 1999 with husband Ryan Phillippe at the age of 23. Her second kid and first son named Deacon Reese arrived in October 2003. On 26 March 2011, she remarried Jim Toth in front of 120 family members and friends.

Actress Reese Witherspoon holds her kid
Hollywood’s Celebrity Moms
Related links:
Top Youngest Mothers in the History
Hollywood’s Youngest Celebrity Moms