Growing up with lessons in dance, martial arts, guitar, violin, and drums, it was a relatively easy transition from the practice of law to the entertainment industry. Antonia trained with the late, great Cliff Osmond and a number of other talented teachers including Carissa Blix and Beau Bonneau (Commercial On-camera), Dana Cory and Ed Hooks (Improv), Jim Jarrett (Meisner Technique), Kurtis Matthews (Stand-Up Comedy), Paoli Lacy (Physical Comedy), Carla Pantoja (Stage Combat), Tamisa A'awapuhi (Tahitian Ori), Amanda Grady (Odissi Indian Classical Dance), Ronnie Reddick and Christiane Crawford (Hip Hop Jazz), Toran McGill (Pole Dancing), Jake Kimball and Simon Rowston (Trapeze), Betty Shamieh and Josephina Lopez (Writing), Tina Mabry (Directing), and Ben Ferrer (Lighting).
First booking jingles for Mattel, Antonia now boasts credits that include on-camera and voiceover work for popular video games, commercials, and documentaries. She has acted in numerous films including Sundance Film Festival winner Dopamine and television shows House MD and Trauma. Antonia has also performed on stage with the American Conservatory Theater, San Francisco Mime Troupe, Golden Thread Productions, San Francisco Opera, and a host of other theatrical companies as well as played the didjeridu in the Bank of America Down Under Tour for the 2000 Olympic Games. A long time singer of every genre, her credits include arias for Michael Kaulkin's opera The Ghost of Wu, live jazz performances with the Tom Shaw Trio and Marcus Shelby, and award winning dance vocals for The Body Electric as a member of Leo Frappier Band (LFB).
"Kathleen Antonia is sublime" - Richard Connema, Talkin' Broadway
"Kathleen Antonia captivated the audience" - Dave Moodie, The Sneak Preview
"The acting tended toward the declamatory, with only Kathleen Antonia ... truly touching her character's heart--and ours." - Barry Wisdom, Backstage West
"The lovely Kathleen Antonia is a standout" - Robert Hurwitt, San Francisco Examiner
"diva extraordinaire!" - Reid Dennis, Spectrum
"strong vocals, stage presence, and nuanced performance make [Kathleen Antonia] the highlight of the evening." - Karen Macklin, SF Weekly
"brilliant new CD release ... a baker's dozen of delicious standards to be sure." - Sister Dana Van Iquity, San Francisco Bay Times
"As the only black character who speaks ... Fanny bears the onus of representing all African natives and even the country itself. That's a lot to ask of a character and an actor, but [Kathleen] Antonia does it with a dignity that makes you wish this were her story and not Rhodes'." - Chad Jones, The Oakland Tribune
"I knew about the voice. I had no idea about the thighs!" - director John Fisher