Gwyneth Paltrow has moved on from Chris Martin, sources say, but apparently not with the young, blond mystery man she was spotted with last month. Insiders tell Us that Paltrow, 41, is now dating executive producer Brad Falchuk, 43. Falchuk is the co-creator of Glee, in which Paltrow has guest-starred five times. "Things started off professionally" between her and Falchuk, a source says, and progressed from there. A witness who recently spotted the pair on a dinner date says they were "flirty," and they've reportedly also gone on a weekend trip together.