Jack OsbourneJack Osbourne accidentally consumed alcohol for the first time in three years when he attended Princess Beatrice’s 18th birthday party last week.

Jack voluntarily entered rehab in 2003 for his drink and drug additions and has been clean and healthy ever since - until he consumed a vodka jelly at the party.

He explained: “they brought out a strawberry jelly and didn’t say it had vodka in it.”

Jack went to the 1888-themed fancy dress party as Jack the Ripper but didn’t like many of the guests at the royal celebration.

“The amount of posh people there was unreal. There were so many Eton schoolboys. I couldn’t relate to them. I don’t walk around wearing a ring with my family’s crest on it and say, ‘Woof woof!’”