Celebrity Parents Katharine McPhee Shares Rare Photo of Son Rennie on Capri Boat Outing: 'Too Much Fun in the Sun' Katharine McPhee shares 17-month-old son Rennie with husband David Foster By Georgia Slater Georgia Slater Twitter Georgia Slater is a writer/reporter on the Parents team at PEOPLE. People Editorial Guidelines Published on July 7, 2022 04:25 PM Share Tweet Pin Email Photo: Katherine Foster/Instagram Katharine McPhee's little boy is tired out from his day at sea! On Thursday, the actress, 38, shared a rare shot of her 17-month-old son Rennie, whom she shares with husband David Foster, as he sweetly rests in his mom's arms while on a boat outing in Capri, Italy. In the snap, posted on her Instagram Story, the Smash alum gives her son a kiss on the head as he wraps his arm around McPhee. "Too much fun in the sun ☀️," wrote McPhee, who has been vacationing in Capri this week with her husband and friends. Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories. Katherine Foster/Instagram Katharine McPhee Shares First Photo of Son Rennie's Face in Father's Day Tribute to David Foster Last month, the singer shared the first photo of son Rennie's face as she posted a series of pictures in honor of Father's Day. Among the carousel of shots is one image of McPhee and Foster, 72, with Rennie, whose face can be partially seen looking down at a piano. The actress had previously hidden her little one's face entirely from view when sharing photos of him on social media. In the caption of her post, McPhee paid tribute to Foster, whom she described as being the man "who loves me like I could have only dreamed of & who made me complete in life by making me a mommy." Katharine McPhee/instagram "I love our little family. I love our big family," McPhee continued. "You have NEVER complained over how your life is slightly different now. Well… you only complain that you can't stay up late watching TV in bed but how can I blame you -that's your favorite thing." Added the star, "You've only made bringing Rennie into the world an absolute joy for me. To many more adventures baby! 🎊I love you to the moon and back." McPhee and Foster, who tied the knot in June 2019 after first meeting in 2006, welcomed their son in February 2021.