Amanda Seyfried  and Justin Long  have been dating since August 2013 , but they didn't walk their first red carpet together  until Tuesday night. At the opening of Neil Patrick Harris 's Broadway production of Hedwig and the Angry Inch in NYC, the couple kept close, holding hands, hugging, and stealing glances as they headed into the show. The two are no strangers to PDA — they have been spotted walking her dog, Finn, while hand in hand  and stealing kisses  around the Big Apple. Both are keeping busy with a handful of projects under their belts, too. Next up, Amanda has A Million Ways to Die in the West  with Neil, Seth MacFarlane, and Charlize Theron , and Justin costars with Community's Gillian Jacobs in The Lookalike.