Brian O’Driscoll gives newborn son his first piece of advice

Billy O’Driscoll was only born yesterday, but already his rugby legend dad, Brian O’Driscoll, is passing on his wisdom.

The sports star took to his Twitter page today to share a photo of a message he stumbled upon outside of a café.

The message on the blackboard reads: “Congratulations. Free coffee for Billy O’Driscoll”.

Posting the photo up on his social media page, the 35-year-old wrote: “Son, if I can give u [sic] one piece of advice, never look a gift horse in the mouth!”

Brian was pictured beaming last night as he popped out of the hospital where actress wife Amy Huberman gave birth to the couple’s second child.