Rashida Jones and Will McCormack’s romantic comedy pilot is beginning to round out its cast. EW has confirmed that Cristin Milioti, who plays the titular character on CBS’s How I Met Your Mother, has signed on to play one of the two lead roles in the single-cam pilot A to Z. Milioti will play Zelda, “a lawyer at a small public-advocacy firm who is known for her ‘realist’ outlook on life … Alternately serious and hilarious, Zelda loves being a grown-up and doesn’t understand why anyone over 20 would go see an animated movie or eat ice cream sundaes. Destiny and fate are not in her vocabulary; she believes she controls her own destiny.” A to Z will follow Milioti’s character as her relationship with a man named Andrew evolves from the moment they initially meet to their breakup. The role of Andrew has not yet been cast.