The actor - whose long-term partner Farrah Fawcett died last June after losing her battle against cancer - is said to be dating iconic 70s poster girl Cheryl Tiegs and sources claims the pair are smitten with each other. One said: "It`s a full-blown love affair." The pair have been on a string of dates and onlookers say they look very happy with each other, according to National Enquirer magazine. During a recent party for Beverly Hills socialite Nikki Haskell one said: "They spent most of the night sitting very close together on the terrace, talking." At a bash for Raquel Welch`s new book last week, Ryan had his arm around Cheryl`s waist and a fellow guest noted: "It was clear that they were very happy together." Ryan, 69, and 62-year-old Cheryl have been friends for a long time but lost contact before reconnecting after she attended Farrah`s funeral. During the wake, Ryan has since admitted he accidently flirted with his daughter Tatum O`Neal after he didn`t recognise her. He said: "I had just put the casket in the hearse and I was watching it drive away when a beautiful blonde woman comes up and embraces me. I said to her, `You have a drink on you? You have a car?` She said, `Daddy, it`s me - Tatum!` "I was just trying to be funny with a strange Swedish woman and it`s my daughter. It`s so sick."