Jack Osbourne's dog has died.

The 'Adrenalin Junkie' star is devastated by the loss of his ''best friend'', 12-year-old Bulldog Lola, who passed away yesterday (21.02.12).

He tweeted: ''Lola you were the best friend anyone could ever have. I will love you and miss you always. RIP @PrincessLolaO (sic)''

Jack - who is expecting his first child with fiancee Lisa Stelly - later used his twitter page to thank fans for their messages of support.

He wrote: ''Thank you all for the kind words about @PrincessLolaO it's nice to know she was loved by so many people. (sic)''

Jack's sister Kelly was equally devastated by Lola's death.

She tweeted: ''night night tweet hearts not doing so good losing @PrincessLolaO is really taking its toal on me! (sic)''

Lola was known to fans for her antics on reality TV show 'The Osbournes' - in which she famously tore up furniture and peed through the family home - and had over 9,000 followers on a twitter account in her name.

A message appeared on the account yesterday reading: ''Thank you ALL for your kind words. I'm in a better place now. Heaven needs a new princess :) (sic)''