The 38-year-old actress shared new photos with Suri, her 11-year-old daughter with ex-husband Tom Cruise, on the holiday Sunday.
"Happy Mother's Day!!!!! #blessed @georginachapmanmarchesa," Holmes captioned a picture of herself modeling a gown with Suri by her side.
"#happymothersday," she added to another snapshot of herself snuggling with her lookalike daughter.
Holmes' posts follow word she met rumored boyfriend Jamie Foxx in Paris last week. E! News reported Holmes, who split from Cruise in 2012 after five years of marriage, left the city with Foxx on Thursday.
"Jamie wrapped filming on Robin Hood and Katie flew in to Paris to meet him for a few days," a source said. "Tom Cruise was filming Mission Impossible 6 only a few blocks away, but Katie and Jamie stayed inside their hotel."
Holmes last starred as Jacqueline Kennedy in the Starz miniseries The Kennedys: After Camelot, which premiered in April. She previously told Access Hollywood that Suri enjoyed visiting her on the show's set.
"She's pretty used to it because she's grown up on a lot of sets," the star said of her daughter. "She enjoys it and she's very creative herself ... She's a great partner."