Two-time Olympic champion Rebecca Adlington is no stranger to making a splash and now she wants more kids to hit the pool.
The gold medal winner is backing a new campaign to help children get fit through swimming.
She's teamed up with Team GB's diving hero, Tom Daley, to launch hundreds of family swim sessions across the UK.
"We aren't doing enough exercise and everyone's a bit guilty of that," Rebecca told Newsround.
"I think it's just [about] trying to be as active as possible."
After competing in amazing events like the 2008 and 2012 Olympics, Rebecca retired in 2013.
She's now back in the pool - not for medals, but to inspire you guys through the scheme between Change4Life, Disney and the Amateur Swimming Association.