In pictures obtained by The Sun, Horne, 45, is seen pushing an empty buggy while his wife cradles the infant as they make the most of the bank holiday weekend weather.
Gavin and Stacey actor Mathew Horne has reportedly become a first-time father after secretly welcoming a son with his wife, set designer Celina Bassili, who he married last year.
Gavin and Stacey star Mathew Horne secretly welcomed baby boy ok.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ok.co.uk Daily Mail and Mail on Sunday newspapers.
Sheridan Smith in talks to reunite with ex James Corden for huge TV comeback | OK! ok.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ok.co.uk Daily Mail and Mail on Sunday newspapers.