Amanda Seyfried and her boyfriend of just six months, Thomas Sadoski, have got engaged. Amanda Seyfried has got engaged. The 30-year-old star is to marry Thomas Sadoski after her 'Last Word' co-star popped the question just six months into their relationship, and she was spotted out walking her dog Finn in New York City last week with a ring on her wedding finger. A source told Us Weekly magazine: "Tommy and Amanda recently got engaged and shared the happy news with family and close friends." In March, it was revealed the couple had started dating after reuniting on the set of US drama movie 'The Last Word', in which Amanda portrays young writer Anne Sherman. The blonde star and the 40-year-old actor first met in 2015 while co-starring in play 'The Way We Get By'. Amanda - who has previously dated Justin Long and Dominic Cooper - will walk down the aisle for the first time, but it will be Thomas' second marriage. He was previously wed to wife Kimberly Hope for eight years, but they split in the summer of 2015. Amanda and Thomas were first romantically linked to each other in March before their romance was confirmed in May. As well as Justin - who she was in a relationship with for two years - Amanda appears to have a penchant for actors as she has dated the likes of Josh Hartnett, Ryan Phillippe, Alexander Skarsgard and Desmond Harrington. The actress has previously admitted she won't wear white on her wedding day because she has been involved in so many nuptials through her acting roles. She said: "I got married so many times in my life - on-screen. I don't want a white dress! I've worn so many of them. "The fact is, that kind of stuff is less about the ceremony and more about the commitment. So it's like children. That's where it's at, right? For me. But it's different for everybody."