Rachael Leigh Cook is feeling giddy about her boyfriend, Kevin Mann, who she went Instagram official with in July.ET's Nischelle Turner spoke to Tuesday's guest co-host about her new Hallmark movie, Tis the Season to Be Merry, and what a holiday date night looks like for her and the producer.«I did good, Nischelle. I did good,» Cook gushed after a pic of the pair was flashed onscreen.