Who knew?

We sometimes forget that some of Hollywood's biggest names didn't get their start from failed auditions and school plays. They got it from a past career as professional athletes!

See the top 8 celebs that got their start in sports:  

8. David Beckham 

People forget that David's claim to fame isn't his gorgeous wife, his perfect family, his sexy underwear photo shoots or his constant, athletic paparazzi shots. He's a former professional soccer player for the Los Angeles Galaxy! 

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7. Mike Tyson 

Before appearing in Hollywood Blockbusters like the Hangover, Mike was a professional boxer and a former, heavyweight champion of the world. No big deal. 

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6. Arnold Schwarzenegger

Actor, governor and athlete? Before becoming a Hollywood Star and major politician, Arnold was a professional bodybuilder. Remember? 

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5. Stacy Keibler

She's not just George Clooney's gorgeous ex-girlfriend! She was a professional wrestler for many years and competed as a WWE Diva. Who knew? 

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4. Dennis Rodman 

The first thing that may come to mind when hearing this name lately is probably his recent trips to North Korea or his appearance on reality shows including Celebrity Apprentice. But long before that, Dennis was a professional basketball player for teams including the Los Angeles Lakers and the Chicago Bulls. 

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3. Maria Menounos 

Believe it or not, Maria was once a WWE Diva wrestling with the Bella Twins, Alicia Fox and more stars from Total Divas!

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2. Dwayne "The Rock" Johnson

Before San Andreas there was WWE. He had countless championship titles and is considered a WWE legend. 

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1. Caitlyn Jenner

Before she hit reality TV gold on Keeping Up With the Kardashians, Caitlyn (formerly known as Bruce Jenner), was a gold medalist in the 1972 men's decathalon! She remains extremely athletic today as chronicled on the Kardashian reality shows and her new series I Am Cait

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Tune-in to the premiere of WAGS Tuesday, Aug. 18 at 10/9c only on E!