How Cobie Smulders' 'How I Met Your Father' Cameo Was Kept a Secret From the Cast (Exclusive)
's epic season finale cameo was kept secret — even from the cast! ET's Cassie DiLaura spoke with the cast of the Hulu series about how alum Cobie Smulders' appearance was kept quiet among their group.Smulders, who played Robin Scherbatsky on , popped up on the finale as her past character, eager to offer some much-needed advice to Hilary Duff's Sophie, amid Jesse's (Chris Lowell) early declaration of feelings, and his love triangle with her and his ex, Meredith (Leighton Meester).«I think there's no better person than Cobie to give Sophie that boost of confidence that she needs in that moment,» Duff told ET. «She's iconic, all the cast is, so for her to jump on board and just be there for us, it really was a dream come true.