Kim Kardashian  turns 33 today, and we're celebrating the major milestone with a look back at her sexiest bikini pictures. It's been a big year for Kim and her family, especially boyfriend Kanye West . The couple welcomed daughter North West in June, and Kim made sure to let the world know that she's back in bikini-ready shape with a recent swimsuit photo  on social media. From hitting the beach in a bikini to posing for photo shoots in sexy two-pieces, we've rounded up over 30 of Kim's best swimsuit photos. Happy birthday, Kim — here's to another year full of great bikini moments!
Kim Kardashian  showed off her hot bikini body during an LA photo shoot in July 2009.
Kim Kardashian  walked along the beach during a November 2008 trip to Miami.
Kim Kardashian  kept her famous curves hidden under water while posing for FHM's October 2009 cover.
Kim Kardashian  wore an orange two-piece while holding on to her nephew, Mason Disick, while vacationing in Mexico in May 2012.
Pregnant Kim Kardashian  wore a metallic bikini in LA, just days before she gave birth to daughter North West in June 2013.
Kim Kardashian  showed off her baby bump while soaking up the Mykonos rays in Greece in April 2013.
Before shooting a swimsuit commercial, Kim Kardashian  and her sister Khloe practiced their bikini poses.
Kim Kardashian  wore several bikinis — including this purple one — during a vacation in Mykonos, Greece, in April 2013.
Kim Kardashian  let loose in the ocean during an August 2008 trip to Cabo San Lucas, Mexico.
Kim Kardashian  gave fans a glimpse of her bikini body during a photo shoot in June 2012.
During a work trip to the Bahamas in 2009, Kim posed in a bikini for a People magazine spread.
Kim Kardashian  playfully posed with her then-boyfriend Reggie Bush for their sexy March 2009 GQ spread.
Kim Kardashian  wore a colorful Agent Provocateur  bikini on Miami Beach in July 2012.
Kim Kardashian  got silly on a trampoline during a July 2009 photo shoot in LA.
Kim Kardashian  wore a barely-there bikini while going for a swim in August 2012.
Kim Kardashian  took in the sites in a black bikini while in Mykonos, Greece, in April 2013.
Kim Kardashian  slipped on a bright blue bikini for an afternoon by the pool in La Romana, Dominican Republic, in July 2012.
Kim wore a see-through cover-up during a May 2009 promotional event in Malibu.
Kim Kardashian  hit the ocean in Miami Beach during a July 2007 trip with her sisters.
Kim Kardashian  took a break from her busy schedule and headed south of the border to Cabo San Lucas, Mexico, in August 2008.
Kim Kardashian  waved to the camera while vacationing in Monte Carlo in June 2008.
Kim and Reggie made a fine pair in GQ magazine's March 2009 issue.
Kim Kardashian  flaunted her postbaby figure in a white swimsuit in October 2013.
Kim Kardashian  sported a retro two-piece during a Hawaiian vacation in August 2012.
Kim Kardashian  shared a photo of herself in a white bikini during a trip to Mexico in 2008.
Kim Kardashian  shared her dieting and exercise tips with bikini photo spread in Life and Style in May 2009.
Kim Kardashian  hit the water in a black bikini during a trip to Miami in November 2008.
Kim Kardashian  graced the June 2010 cover of Shape magazine in a tiny purple two-piece.
Kim showed off her blond locks and blew a kiss to her Twitter followers in September 2009.
Kim Kardashian  and her sister Kourtney cooled off at the pool on vacation in Monte Carlo in June 2008.
Kim Kardashian  filmed Kim and Kourtney Take Miami on the beach with her sister in March 2010.