The 31-year-old actress and partner Jason Sudeikis welcomed son Otis into the world in April 2014, and Olivia is relishing every second of watching her little boy grow up.
She said: “He is becoming a little individual and his personality is starting to emerge and it’s amazing.
“I’m more and more excited to be a mother — and to be his mother — because I think he’s a wonderful little person.”
As Christmas is fast approaching, Olivia is looking forward to enjoying the festive season with her son now that he is more aware of what’s going on.
Despite having two Hollywood actors as parents, Olivia is determined that Otis won’t be spoiled and will appreciate how lucky he is to receive presents over the holidays.
Olivia added to America’s People magazine: “I hope that my son ends up equating the holidays with the need to give back more than any other time of the year.
“I think it should be a time when we realize how lucky we are and keep in mind that there are many people who aren’t going to be celebrating the holidays.”
The ‘Rush’ actress works tirelessly on various charity pursuits as well as a busy acting career.
Her latest venture has seen her team up with Gap and sock company Bombas to donate socks to the Los Angeles Mission, and she is keen for Otis to follow in her philanthropic footsteps when he gets older.
She said: “This is the kind of project that I look forward to bringing him to once he’s conscious of what it means because I think it’ll be very important for him to have experience with this stuff like I did.”