This is going to be Miley's biggest Party in the U.S.A. yet. Despite being just 19, Miley Cyrus had a big engagement announcement this week, and an even bigger 3.5-karat Neil Lane diamond sparkler from Liam Hemsworth, 22. Young love and big commitments in Hollywood are hardly new, but are they everlasting?
Married young: Spears married back-up dancer Kevin Federline at just 22. He was 26.
Status: This wasn't Spears' first go at marriage. Six months prior, she married childhood friend Jason Alexander in Las Vegas and 55 hours later had it annulled. Spears and Federline had two boys, Sean Preston and Jayden, before filing for divorce in 2006. Spears boasts a happy update — in December she became engaged to longtime boyfriend Jason Trawick.
Married young: Rimes wed dancer Dean Sheremet at 19. He was 21.
Status: The two were married for eight years until Rimes began stepping out with actor Eddie Cibrian. She and Sheremet divorced in 2009, and Rimes married Cibrian in 2011.
Married young: The MMMBop singer said "I do" to girlfriend Natalie Bryant at age 19.
Status: The two teens wed while Bryant was four months pregnant in 2010, and 10 years later, they're still going strong. The couple now have four children, and are expecting Baby No. 5 this year.
Married young: The People Like Us star married Tao Ruspoli, the son of an Italian prince, on a bus when she was 19.
Status: After eight years of marriage, Wilde filed for divorce in 2011. These days, she is quietly dating SNL's Jason Sudeikis.
Married young: The former teen queen married ice hockey player Mike Comrie in 2010 when she was 22. He was 29.
Status: The happy couple are together and recently welcomed a baby boy, Luca.
Married young: Barrymore married Welsh bar owner Jeremy Thomas when she was 19. He was 32.
Status: They two married abruptly in a Los Angeles bar and the union lasted one month. But there's a happy update for the Big Miracle star — pregnant and beaming, she married art dealer Will Kopelman just days ago in an intimate wedding at her home in Montecito, Calif.
Married young: It was a punk wedding for Lavigne, who wed Sum 41 singer Deryck Whibley in 2006 at age 21.
Status: Lavigne filed for divorce in late 2009.
Married young: Hudson married Chris Robinson in 2000 at 21. He was 35.
Status: The couple was married for almost six years and had a son, Ryder, before splitting in 2006. Hudson is currently engaged to Muse rocker Matthew Bellamy and they had a baby boy, Bingham, together in July of 2011.
Married young: Culkin married girlfriend Rachel Miner in 1998 when they were both just 17.
Status: The two separated in 2000, and Culkin later dated Mila Kunis.
Married young: Simpson married fellow pop star Nick Lachey in 2002 at 22. He was 29.
Status: Their marriage, viewed nationwide on MTV reality show Newlyweds, went sour as her career
heated up and his stalled. Simpson filed for divorce in 2005. Both stars have moved on: Simpson recently had a baby girl, Maxwell, with fiancéEric Johnson. In 2011, Lachey married TV personality Vanessa Minnillo; the two are expecting a baby this year.
Married young: Simpson tied the knot with fellow musician Pete Wentz in May 2008. She was 23, he was 28.
Status: The couple had a son, Bronx, in December 2008, but by early 2011, Simpson filed for divorce.
Married young: Two years after meeting at Witherspoon's 21st birthday party, she and Ryan Phillippe married in1999.
Status: This pair were married for seven years and had a daughter, Ava, in 1999 and a son, Deacon, in 2003. They split up in 2006. Today, Witherspoon is remarried to CAA agent Jim Toth, and the couple are expecting a baby this year.