The actress and her husband Ryan Dorsey are weeks away from welcoming a little one to their family, and they were feted in Los Angeles during an intimate gathering with their closest family and friends.
Among the guests at the party were Riley and Rivera's former onscreen wife Morris, who became a first-time mum in 2013.
Rivera and Dorsey chose a children's book theme for the shower, incorporating their favourites such as Where Is Curious George, The Complete Tales of Winnie the Pooh, and Love You Forever, the cover of which was recreated in a giant cake form.
Rivera gushed over the party to People magazine, saying, "I'm so grateful that our baby is already surrounded with so much love."
Rivera and Dorsey wed in July last year (14).