Tom, 28, shared a picture of himself and his little man bobbing around in the pool with his Instagram followers earlier today (10 June).
In the snap, Tom is kissing Buzz on the cheek while cradling him in the water. Buzz, meanwhile, is starring straight ahead at the camera.
That's definitely one for the album, Tom!
In March, Tom and his wife Giovanna welcomed Buzz into the world and they are clearly loving parenthood.
But while Tom has been busy exercising in the pool, Giovanna has found a much better way to lose her baby weight...
Last night, Tom snapped a picture of Giovanna as she worked out with a gym ball while watching the telly. Alongside the photo, he joked: "This is how new mums watch tv."
We like that kind of exercise, Giovanna!
Celebrities who have welcomed babies in 2014:
Copyright: Rex Features WENN/Matthew Taylor/Daniel Deme/Josiah True/Matthre Taylor/Joe