The first heat saw Michaela Strachan, Gemma Merna, Gemma Collins, Perri Kiely and Ricky Groves take the plunge, as Daley and judges Andy Banks, Jo Brand and Leon Taylor watched on.
The series got off to an undeniably shaky start last January, as viewers and critics questioned why ITV had let the show see the light of day.
However, Splash! proved to be a ratings success for the channel, which led to its renewal shortly after last year's February final.
What did you think of the show's return? Are you glad to see Splash! back for another year? Is the series better second time round?
Finally, what do you make of this year's celebrities and their performance in tonight's first heat?
Share your thoughts on the return of Splash! in the comments section below...