Multiple sources confirmed the happy baby news to E!, although McAdams’ representatives could not be reached.
The 39-year-old actress has been romantically linked to Linden, 37, since April 2016 and the pair have since kept a fairly low profile (including no joint red carpet appearances).
Speaking about motherhood in 2010, McAdams told InStyle: “Part of me is very attached to the idea of having children.”
She added: “It’ll depend on if I find the person I want to do that with.”
This article originally appeared on marie claire.