<P> Beth Pearson, portrayed by Susan Kelechi Watson, is Randall's wife, whom he met in college and later married, circa 1999 . The couple has two daughters, Annie and Tess . Their marriage is based on honesty where they make an effort not to have secrets from one another . William revealed to Beth that he had met and communicated with Rebecca . This caused Beth to give Rebecca an ultimatum: to either tell Randall or she would . Growing up, Beth lived in a three - bedroom house with 14 other people . After Randall quit his job, Beth took a job so Randall could be a stay - at - home dad . But after a while, Beth thought Randall was in "outer space", and Beth thought working again would be good for Randall . </P> <P> When Annie's pet lizard "Mr. McGiggles" went missing during a Super Bowl Party, she accidentally stepped on him, killing him . </P> <P> Toby Damon, portrayed by Chris Sullivan is Kate's fiancé Toby was born in Palm Springs, California . Toby began dating Kate after they met at a weight - loss support group . Toby is confident with his own body although obese, and encourages Kate to have better self - esteem . He was previously married to a woman whom Kate views as beautiful and successful, but who treated him badly . Toby gained 90 pounds in the first year after his divorce . </P> <P> Refusing to take Kate's hesitance about the relationship lightly, Toby has continually come up with sweet gestures to win her over . In the beginning, he felt that he had to compete with Kevin for Kate's attention . Despite breaking his weight - loss goals, Toby decided dieting was not for him and went off his diet, resulting in Kate breaking up with him . He surprised Kate by showing up at Randall's house for Christmas Eve, stating that he could live without pizza and junk food, but that he could not live without her . On Christmas Eve, Toby collapsed and ended up in the hospital with an arrhythmia . </P>

Who is kate's boyfriend on this is us
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