The actor's rep recently confirmed his relationship with the comedian.
In the pics, which were taken on Wong's 41st birthday, the couple was all smiles while on a hike near her home. Both kept things casual for the outing, with Hader, 44, in a red T-shirt, gray sweats and a baseball cap, and Wong sporting a black shirt and pants, as well as a straw hat.
After their hike, the couple, who both wore sunglasses and matching HOKA Anacapa Low GTX sneakers in Tiger's Eye/Black, headed out for a dinner in honor of Wong's birthday.
The sighting came shortly after Hader's rep confirmed to ET that he's currently dating Wong. The duo was first linked in December 2022 only after they had reportedly parted ways, with Page Six suggesting that they had quietly been together for a few months. Then, earlier this month, Hader referenced his "girlfriend" in a new interview with Collider.
Last April, Wong announced her separation from Justin Hakuta after eight years of marriage. They share daughters Nikki, 5, and Mari, 7. As for Hader, he shares daughters Hayley, 8, Harper, 10, Hannah, 14, with his ex-wife, Maggie Carey. They divorced in 2018, and Hader has since dated Rachel Bilson and Anna Kendrick.