McCarthy, 40 – who was hosting a Dancing with the Stars charity event – rocked a plunging black dress and her hair styled in loose waves, while Wahlberg, 44, sported a black tux and red boutonnière.
The coordinated couple cozied up to one another as they walked the red carpet at Hotel Baker in St. Charles, Ill.
It has been a red-hot summer for the duo, who began dating in July.
The outspoken blonde was named the new co-host of The View, which premieres Sept. 9 on ABC. Wahlberg has been touring with New Kids on the Block, and his TV show, Blue Bloods, was renewed for a fourth season. It premieres Sept. 27 on CBS.