Amanda Seyfried
Seyfried was seen holding on to Sadoski as the couple walked to their trailers post film in Pasadena, CaliforniaReuters

Actress Amanda Seyfried is rumoured to be dating Last Word co-star Thomas Sadoski. The Ted 2 actress, who previously dated actor Justin Long split after dating for two years in September 2015, while The Newsroom actor reportedly separated from his wife of eight years, Kimberly Hope, in October 2015.

According to Us Weekly, Seyfried, 30, and Sadoski, 39, became friends at the off-Broadway production of The Way We Get By last year and got "romantically involved" on the sets of the Last Word recently. "Amanda and Thomas are definitely dating right now. She's no longer single," a source told the magazine.

People magazine reported that Seyfried was seen holding on to Sadoski as the couple walked to their trailers while filming in Pasadena, California on 2 March. The following day the two were spotted arriving at work together along with the actress's dog Finn. In June 2015, Seyfried and Sadoski walked the red carpet together at the Tony Awards.

At the time, the actress had told Vogue: "Making movies in two solid months of 12-, 14-hour days. I mean, it can ruin your relationship."

Meanwhile, an insider told People, "[Seyfried and Long parted] because they each wanted to eventually have a family but ultimately they weren't compatible and decided to split up. They are still on good terms and friends."

In Last Word, Seyfried plays the character of a local writer who is tasked to work on the obituary of a highly successful business woman, played by Shirley MacLaine.