Sherlock Holmes star Rachel McAdams and her boyfriend Jamie Linden were reportedly gushing over their newborn son and calling him a "good baby."

The actress was out with Linden, who had a baby boy in his arms, multiple witnesses claim.

McAdams did not confirm her pregnancy but she was seen out with Linden back in February and she appeared to be seven or eight months pregnant according to witnesses. The actress has also been keeping a low-profile in the past few months, she even skipped the February premiere of her film, Game Night, which also starred Jason Bateman.

Rachel's Secret Pregnancy

McAdams shared her thoughts about motherhood during an interview with People Magazine in 2009. The 39-year-old actress, who was dating actor Josh Lucas at the time, stated that she would love to be a mom someday and touched on how her mother inspired her.

"My mom is a great inspiration to me. She's a nurse and very nurturing and gentle. She lets me be who I am. Hopefully I can take on those qualities and be as great as her," the actress stated.

Prior to her relationship with Linden, the actress was romantically linked to Ryan Gosling, Michael Sheen, and Patrick Sambrook. The Mean Girls star has been known to be notoriously private about her personal life.

Linden, 37, is a screenwriter, who has written several films including Dear John and We Are Marshall.

Linden and McAdams were first spotted together in a wedding in Virginia in April 2016, and reports claim that they became a couple during the summer of that year. It's worth noting that the couple is yet to make their red carpet debut.

More Celebrity Babies On The Way!

McAdams' Game Night costar, Jesse Plemons, is also expecting his first child with Bring It On actress Kirsten Dunst. The couple has yet to confirm the baby's gender, but sources suspect the actress will give birth to a girl.

Keeping Up with The Kardashians star, Khloe Kardashian, is patiently waiting for the arrival of her daughter, which is also her first child. The reality star and her boyfriend, NBA player, Tristan Thompson, confirmed her pregnancy in December 2017.

Rapper Cardi B also confirmed her pregnancy during her appearance on Saturday Night Live. The former Love and Hip Hop reality star is expecting a baby with her fiance, Offset, who is from the group Migos.