The two first met when McPhee was on American Idol, and though they kept their relationship private when they got together years later, Foster's daughter, Erin, gushed about her back in October.
"My dad is kind of a hopeless romantic, and Katharine's awesome," she told People. "We really, really like her, and we've known her for a really long time. And if he's happy, we're happy."
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It'll be the second marriage for McPhee, who was married to Nick Cokas from 2008 to 2016. And it'll be the fifth for Foster, who was previously married to B.J. Cook, Rebecca Dyer, Linda Thompson, and Yolanda Hadid.
There are no photos of the ring just yet, but Foster is already taking to the "Instagram husband" title pretty well. McPhee posted photos from the Capri trip and noted it took about 50 tries to get the right angles.
McPhee did the same for her future husband, serving as vacation photographer for his Instagram. After all, the couple who Instagrams together, stays together.
Congrats to the happy couple!
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