Mad Men star Vincent Kartheiser is reportedly dating actress Alexis Bledel, who recently guest starred on the show as his character Pete Campbell’s sex-starved mistress.

The 33 year-old actor and 30 year-old Gilmore Girls star have been spending a lot of time together, and they are certainly not timid since they shared a passionate lip-lock during a flight from NY to LA last week.

“They came over to the gate right as I was boarding and I saw him first. His hair is fuller and he’s got a beard, but I recognized him right away. He walked over and a girl with him sat down and it was Rory f—ing Gilmore,” an eyewitness said. “He was leaning over the back of his seat talking to her and leaned over and kissed her.”

Vincent previously dated actress Rachel Lee Cook and Alexis was in a relationship with her Gilmore Girls co-star Milo Ventimiglia for more than three years.

[images: Joseph Marzullo/Starbux/wenn.com]