SIR Chris Hoy has shown off a picture of his baby son Callum and told his family and friends he says "Hi".

The six-time Olympic champion became a father for the first time when his wife Sarra gave birth to Callum last month.

And he delighted his Twitter followers yesterday by uploading a photograph of Callum, who was born 11 weeks premature, in his hospital bed.

Sir Chris wrote: "Thanks for all your messages for Callum.

"He's doing well so far and says hi!"