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Mark-Paul Gosselaar posted on Twitter last month a photo of him and his friend Ben Ceccarelli completely naked while in handstands. The "Franklin & Bash" alum and Ben each wore only a pair of shoes and socks.

Mark-Paul put censor strips to cover their private parts. They named themselves "Team Cocky". The former "Saved by the Bell" star captioned it, "Teaming up with @Piketoon for the @CACrossFit #pairpower competition. @CrossFit. Some would say we've already won."

Teaming up with @Piketoon for the @CACrossFit #pairpower competition. @CrossFit. Some would say we've already won. pic.twitter.com/3EI2uMNWoW

— Mark-Paul Gosselaar (@MPG) February 21, 2015

CrossFit Horsepower posted on Instagram on March 4 a picture of Mark-Paul photobombing his friends, one of which posed upside down, at the gym.

A big thank you to @sfh for hookin our coaches up with tons of goodies! Thank you @mattysfh, you da best!!! (@mpgosselaar on the photo bomb) #reebok #crossfit #crossfithorsepower #crossfithermosa #sfh #strongerfasterhealthier #nohype

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A photo posted by CrossFit Horsepower (@crossfithorsepower) on Mar 4, 2015 at 7:41pm PST

Last month, Mark-Paul and his wife welcomed their second child together. "So in love with our new baby girl, Lachlyn! Born last night 2/17 Mum and baby are healthy and happy. 2 boys, 2 girls, too perfect!" he tweeted to his 150,000 followers.

He also shared on Instagram a photo of his newborn daughter Lachlyn Hope along with caption, "She's a 'mouth-breather' like her Daddy. My sweet little angel."