It is reported that Rosner's wife is Alison Kroeker, who goes by @ali.kroeker on Instagram. She is currently in California, where she works as a documentary producer and writer.
Marcus Rosner's first picture with his partner, Ali Kroeker. (Source: Instagram)
It is unknown when Rosner and Kroeker first started dating. However, it is speculated that the pair got together around 2017.
This is because the actor first posted a picture with his partner on August 30, 2017. He has hidden their faces with animal emojis, but they are dressed formally in front of a lake.
Rosner captioned the picture as "I get those goosebumps everytime..." with a music emoji. Since then, he has often posted about or with his spouse.
However, he either does not show her face or hides it with emojis every time he does so. After dating for a couple of years, the Arrow actor proposed to Kroeker on December 31, 2020.
He made the announcement the following day, on January 1, 2021. He uploaded a grayscale picture of his and Kroeker's hands, where the latter showed off her engagement ring.
Marcus Rosner and Ali Kroker showing off her engagement ring. (Source: Instagram)
Rosner captioned the photo as "In the midst of a life well-lived. #aboutlastnight #nye2020." He also organized a massive engagement party for Kroeker in Edmonton, Alberta.
He thanked his "good friends" for helping him "pull off something very special for someone who was willing to wait a long time."
Then, on January 3, 2021, he posted another picture where he was on his knees, holding a ring box.
