HBO series’ fifth and final season ends March 20. By Aly Semigran Amanda Seyfried Photo: MTV News With the fifth and final season of “Big Love” coming to a close (there are only three episodes left, to be exact), fans of HBO’s off-kilter — and ground-breaking — polygamy drama are gearing up to say goodbye to Bill Henrickson (Bill Paxton) and his entire brood. And while viewers must part ways with the extended Henrickson clan, it seems some of the cast plans to stay something of a family, even after the show has gone off the air. When MTV News caught up with Amanda Seyfried, who played defiant daughter Sarah Henrickson on the Emmy-nominated series for four seasons, she told us letting go of the show wasn’t too tough for her. “I already dealt with the goodbyes. I’m cool,” said Seyfried, who is promoting her latest film, the fairy-tale adaptation “Red Riding Hood.” Turns out, the 25-year-old star was already close, in proximity or otherwise, with some of the show’s cast and crew. “I live right next door to Jeanne Tripplehorn and very close to Ginny [Ginnifer] Goodwin. My best friend, who’s the producer of the show, lives down the street,” Seyfried said, adding, “My brother on the show [Douglas Smith] is like my brother in real life. [They] are already incorporated into my life, so I’m not that sad.” Still, Seyfried — who noted, “It’s gonna suck because we’re not going to be on that set that we’ve been on for seven years playing a family” — acknowledged the rest of the cast (which includes Golden Globe-winner Chlo
