Antonia Mary Prebble (born 6 June 1984) is a New Zealand actress, best known for her role as Loretta West in the hit NZ comedy-drama Outrageous Fortune, as Trudy in The Tribe, as Jane in The Blue Rose, and as Rita West, the grandmother of her character in Outrageous Fortune, on the prequel series Westside.

In the late 1990s she started to work a lot with New Zealand children's TV production companies, with starring and guest roles in several programmes.

She also guest starred in two episodes of Power Rangers: Dino Thunder as Krista, alongside two of her fellow cast members from The Tribe.

Prebble made a cameo appearance in the band Flip Grater's music video for "Careful" and hosted New Zealand's WNTV (What Now Television) from 2002 to 2003.

Prebble had a cameo role in the TVNZ series The Almighty Johnsons as a red-herring for the identity of the Norse goddess, Frigg in the show's first season in 2011.

In 2015 she had the lead role of Rita West in Westside, a prequel to Outrageous Fortune, playing the grandmother (as a young woman) of her character from the original series.

Prebble has given birth on screen five times, starting with The Tribe as a 14-year-old, then Outrageous Fortune, a short film, White Lies, and a play as Mary mother of Jesus ("who just popped out .... and we all sang a song").