Also, Horgan has voiced characters in the film "Valiant" (2005), CBBC's "Big Babies" (2010) and the short film "Miss Remarkable & Her Career" (2010). She has made guest appearances in series including "Moone Boy" (2015), "Crackanory" and on panel shows including "So Wrong It's Right and We Need Answers". In May 2015, she appeared as Elaine in "Man Up", a romantic comedy written by Tess Morris, starring Simon Pegg and directed by Ben Palmer. In 2017, Horgan provided the voices of Minerva Campbell (the long-lost mother of the protagonist, Finn the Human) in the Cartoon Network animated series "Adventure Time", and Courtney Portnoy in the animated series "Bojack Horseman". In 2018, she voiced Queen Dagmar in the animated series "Disenchantment" and also Kathleen in 2019 for the animated series "Bob's Burgers".