Career: After stints in various theatre, TV and film productions, Fillion moved to New York where he starred in soap opera One Life To Live, for which he was nominated for a Daytime Emmy Award. Other early roles came in Saving Private Ryan, Two Guys and a Girl, and Dracula 2000. He eventually landed the starring role as Captain Malcolm Reynolds in Firefly (which he now says was the best acting job he's ever had). He has leant his voice to various animated series and computer games including King of the Hill and Halo 3, but his most successful role to date has been eponymous mystery novelist Castle. Other projects include Desperate Housewives, Waitress, Monsters University and Percy Jackson: Sea of Monsters.

Career: Katic had guest roles in a number of well-known TV series in the early part of her career, including Alias, Dragnet, The Shield, ER, 24, Heroes and CSI: Miami. She has also starred on the big screen in The Spirit (2008) and Quantum of Solace (2008). Her big break came in 2008 when she was cast as Kate Beckett in crime drama Castle alongside Nathan Fillion.

Career: Castellaneta started working at The Second City, an improvisational comedy theatre, in 1983 and stayed until 1987. During this time, he did voiceover work for various radio stations. He was hired to work on The Tracey Ullman Show and he started voicing Homer Simpson in The Simpsons, which was initially aired as a series of animated shorts. The Simpsons has since become a half-hour show and Castellaneta has continued to provide the voice of Homer. He has also voiced many other characters, including Grampa Simpson, Barney Gumble and Krusty the Clown. Castellaneta and his wife, Deb Lacusta, have also written several episodes of The Simpsons. He has done voice acting for a number of other animated series too, including Back to the Future, Aladdin, Earthworm Jim, Hey Arnold!, The Batman and Futurama. Besides voice acting, Castellaneta has had on screen parts in such series as Entourage, Everybody Loves Raymond, Friends, Greek, Parks and Recreation, How I Met Your Mother and Desperate Housewives. He has appeared in such films as K-9 (1989), The War of the Roses (1989), The Pursuit of Happyness (2006), Super 8 (2011) and Fantastic Four (2015).