"Happy Father’s Day to my wonderful husband," Katherine, 29, wrote on Instagram.
"Watching you be such a hands on and loving father was one of the many reasons I fell in love with you, and continue to each day," she wrote. "I love you."
As OK! readers know, Chris, 39, and his bride were first linked in June 2018 and by January 2019 they were engaged.
Nearly a year after dating, the Jurassic World actor and the beauty got married on June 8, 2019 during an intimate and "emotional" ceremony at the San Ysidro Ranch in Montecito, California.
Chris, who shares Jack with ex-wife Anna Faris, divorced the House Bunny actress not long before his romance with Katherine started. The former couple announced their separation in August 2017 and were officially divorced by November 2018 after almost a decade of marriage.
Katherine also shared a few throwback photos to pay tribute to her own father, Arnold Schwarzenegger, on the annual holiday.
"Happy Father’s Day daddy! I love you so much (even when you feed our dog Maverick from the table)!" the ASPCA Ambassador joked.
What do you think of the loving tributes Katherine posted for Chris & Arnold? Let us know in the comments below!