There could be another celebrity making their debut sometime in 2018 and reportedly we may not have to wait much longer. Mean Girls actress Rachel McAdams is allegedly expecting her first child with her boyfriend Jamie Linden.

The 37-year-old actress was spotted leaving a restaurant where eyewitnesses spotted McAdams looking "heavily pregnant."

Pink Or Blue?

McAdams and Linden were having dinner at Staplehouse in Atlanta on Feb. 13 where an eyewitness stated McAdams looked as if she was at least 7 or 8 months pregnant. 

"When they were leaving, somebody asked Rachel if she knew if she was having a boy or girl, and she said she didn't know!" the eyewitness stated

The actress has been keeping a low profile after wrapping up the production of her recent films. Linden and McAdams have been very private about their relationship but eyewitnesses stated that the two were "happy" together at dinner and McAdams was "glowing."

The actress has reportedly stated that she is ready to "settle down" and start a family with Linden. The couple moved in together in fall 2016.

The Sherlock Holmes actress has been romantically linked to Josh Locas, Michael Sheen, and Canadian music manager Patrick Sambrook. The actress' most high-profile relationship was with her The Notebook costar, Ryan Gosling. The two dated from 2005 to 2007 and reunited briefly in 2008. Gosling is now married to actress Eva Mendes with whom he has two daughters.

McAdams is starring in the film Game Night opposite Jason Bateman. The film follows a group of friends that annually get together for a game night, however things take a turn for the worse when one night they find themselves investigating a murder. The film also stars  Kyle Chandler, Billy Magnussen, Sharon Horgan, Lamorne Morris, Kylie Bunbury, Jesse Plemons, Michael C. Hall, Danny Huston, and Jeffrey Wright .

McAdams also starred in the independent film Disobedience with Rachel Weisz, which follows the story of an Orthodox Jew woman that goes back to her home in Hendon London and reconnects with her former female lover. 

Linden is a screenwriter that has written the films We Are Marshall, Dear John, and Money Monster