Russell Brand's dog was treated to a song before undergoing an operation.

The 41-year-old comedian published a video on his Instagram account of him singing to his German Shepherd dog Bear before the canine went under the knife for an unspecified procedure.

In the clip shared on the photo-sharing app, Russell sings the theme tune to the 1979 TV show 'The Littlest Hobo' before having his phone knocked out of his hands by the excitable pooch.

The dark-haired hunk chants: ''There's a voice that keeps on calling me.

''Down the road that's where I'll always be. Every stop I make, I make a new friend. Can't stay for long, just turn around and I'm gone again.''

In the 40-second video Russell is heard calling his dog's name who then runs up to him and causes the camera to fall over.

Russell is then heard saying: ''Who's a good boy? Give me that stick. You ridiculous boy.''

'The Littlest Hobo' was a programme about a German Shepherd who wanders only to stop and do a good deed or help a person in need.

This is not the first time the 'Arthur' actor has posted a video of him serenading his dog, in December last year he sang love songs to his pet on 'The Jonathan Ross Show'.

Russell gave his partner Laura Gallacher - with whom he has two-month-old daughter Mabel - Bear as a gift as he thought it would be good practice looking after the puppy before becoming a father for the first time.

At the time, a source said: ''Ever since Russell moved to the countryside he has been desperate to get a dog - and saw this as the right time.

''He reckons looking after Bear will be good practice for him and Laura before baby arrives this summer.

''If he is as hands-on as he with Bear, he is going to be all right.''