Hannah Montana star Miley Cyrus has launched a new charity in honour of her late grandfather - and is auctioning off a date with her to kickstart the fundraising. The Pappy Cyrus Family Foundation is named after Cyrus' paternal grandfather Ron, who died in 2006, and aims to help deprived children across the U.S. by providing improved health care, education and community support. And Cyrus has taken the first step to raise money for the organisation by giving fans the chance to accompany her to the premiere of her forthcoming film Bolt. She is also auctioning off several items of clothing from her personal wardrobe. The sale will begin on internet site eBay on Tuesday night with bidding closing on 29 July , according to Foxnews.com.