London, Feb 11 (IANS) Socialite-heiress Paris Hilton is rumoured to have got secretly engaged to Doug Reinhardt.

The heiress sparked rumours she has accepted a proposal from the former 'The Hills' star Doug when she accepted an award for her charity work over the weekend, reported femalefirst.co.uk.

During her speech at the Hearts for Hope benefit in Los Angeles, she said: 'I'd like to thank my future sister-in-law Casey Reinhardt'.