The Daily Mail reports that McAdams was recently spotted with Linden and looked "at least seven months pregnant".
Your favourite Mean Girl is pregnant. McAdams has since crafted an extensive and equally impressive resume that's gotten her tons of praise from Hollywood A-Listers and TV and film connoisseurs.
As for the actress's dating history, in the past, Rachel used to date her co-star on True Detective, Taylor Kitsch, as well as Michael Sheen whom she co-starred with on Midnight in Paris. Since their breakup, the two have found love elsewhere.More news: Meet the fashion designer worthy of Queen Elizabeth's time
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The couple were first spotted holding hands in 2016, but have never walked a red carpet together. The pair only lasted a few months before calling it quits.
McAdams is known for closely guarding her privacy, but she has made no secret of her desire to start a family in recent years.
It's unclear who the father is, but the gossip site says fans have speculated she's been dating screenwriter Jamie Linden since 2016.
Numerous sources close to the Notebook actress are claiming McAdams is expecting her first child, E!