The Oscar-winning actor, who stars in Guy's new movie 'Sherlock Holmes', has created a list of desirable women for the British director to date.
A source told National Enquirer magazine: "Robert is determined to find Guy his dream girl. He and his wife Susan Levin put together a list of worthy women for him to pursue.
"Robert and Guy became close friends during the filming of 'Sherlock Holmes' while Guy was going through his painful divorce from Madonna.
"Robert kept telling Guy that what he needed was a new girlfriend to help him forget his troubles. But Guy wasn't ready then."
The two men regularly party together in the UK and US, and Robert never misses an opportunity to introduce Guy to gorgeous women.
The source added: "When Guy and Robert see an attractive woman, Robert introduces himself and follows up with, 'Have you met my friend Guy? He is wonderful!' "
Guy has been linked to several women including Elle Macpherson and Jemima Khan since the breakdown of his marriage.
The 40-year-old filmmaker was recently seen enjoying an intimate lunch with a mystery brunette in Los Angeles, before the pair strolled along the beach.