Katherine Schwarzenegger finds Miley, Patrick 'adorable'

Hollywood star Arnold Schwarzenegger's daughter Katherine says her little brother Patrick and his girlfriend Miley Cyrus are "adorable".

Praising the couple's strong relationship, Katherine says she has no problem with the singer's wild antics because she makes her sibling "happy", reports femalefirst.co.uk.

"I think they're adorable. I mean if my brother's happy then I'm happy and so that's all that matters to me," she told Mario lopez on "Extra".

The couple have been dating for almost a year now, but were thought to be receiving pressure from Patrick's family to split. There were rumours suggesting that the she was a bad influence on the youngster, but Katherine has revealed she's pleased Patrick found someone to love.

"You just want your siblings to be happy so if they're with someone that makes them happy in a happy and healthy relationship then I'm happy," she said.