The former Miss Universe cheered on her man from the sidelines in September 2023.
The couple celebrated their engagement at a garden party in July 2023.
Olivia marked her three-year anniversary in June 2022.
Olivia and Christan have treated fans to a few PDA-filled social media posts during their relationship.
During a vacation to Mexico, Olivia and Christian turned up the heat with a beachside photo.
"3 years of NYE kisses with you," Olivia shared on Instagram when kicking off 2022. "Time flies @christianmccaffrey."
Olivia and Christian have been known to enjoy date nights with Olivia's sister Sophia Culpo and her boyfriend, NFL player Braxton Berrios.
During Super Bowl weekend in 2020, Christian and Olivia attended AT&T TV's Super Saturday Night.
"To my beautiful woman," Christian wrote on Valentine's Day 2021. "1/10 from the free throw line, 10/10 in my heart."
You are the hardest worker with the biggest heart," Olivia wrote on Instagram when celebrating their anniversary in June 2021.