The gold medallist rower-turned-TV star and his wife Beverley Turner welcomed daughter Trixie on Tuesday (05Apr11) at their London home.
Cracknell says, "I'm absolutely thrilled. Beverley is beautiful and very tired and our new daughter is just gorgeous."
The couple already has a son Croyde, seven, and a two-year-old daughter Kiki.
Cracknell's baby joy comes less than a year after he suffered severe head injuries when he was hit by a truck while filming a cycling programme for the Discovery Channel in July (10).