What a cutie!

Olivia Wilde and fiancé Jason Sudeikis touched down at LAX with their son Otis yesterday, and since it has been so long since we've seen the little guy, we can't believe how big he's gotten!

Filming her movie Meadowland, which is about a couple whose son gets kidnapped, made the actress super appreciative of her home life with her son.

"I found myself going home at the end of the night and feeling incredibly grateful to be alive, and to have my son, and for him to be alive. People have asked me after every single screening how I could possibly work on this film while having a new child and did I go home depressed every day? But of course, it's the opposite. I went home so elated because I had recognized my good fortune. Sometimes it takes the exploration of darkness to recognize light," she confessed to Deadline.

They make a precious family unit!