Rachael Leigh Cook is glowing. The 41-year-old actress went Instagram official with her boyfriend, Kevin Mann, on Thursday, looking gorgeous in the photos she posted of the two together.Cook shared three selfies with her beau on Instagram, writing, «This Mann ❤️.» Cook spoke to ET last August about her relationship with the producer, as well as her successful co-parenting relationship with her ex-husband, Daniel Gillies, whom she shares two children with.