Things are heating up between Kate Hudson and Lance Armstrong! Wanna know how we know? The couple (who have been dating for two months) spent Father's Day together with their kids, Kate's ex hubby Chris Robinson, and his new GF. The party of eight (including Kate's son Ryder and Lance's kids Luke, Isabelle, and Grace) brunched at a New York City restaurant as one big, happy family. "[Ryder] was very comfortable with Lance," a spywitness tells Us Weekly. "He ran right towards him!"

Remember when Ashton Kutcher went to the Charlie's Angels: Full Throttle premiere with his now wife Demi Moore, her daughters, and her ex-husband Bruce Willis? And look what happened there…