Ada Nicodemou (born May 14, 1977 in Sydney, Australia) is an Australian actress, best known for her role as Leah Patterson-Baker in the soap opera Home and Away.

She made her TV debut in 1991, in an episode of Police Rescue. Nicodemou first auditioned for Home and Away at the age of 16, losing the role to Laura Vasquez, the audition led to some work as an extra on the show.

In 1994, at the age of 17, Nicodemou was cast as the rebellious Katarina on Heartbreak High. Although the role was initially to be a 12-week stint, she remained on the show for three years. While filming the show, she completed her high school studies by correspondence.

After leaving Heartbreak High, Nicodemou studied Tourism at TAFE. She returned to television in 1998, playing Fiona Motson on the short-lived Breakers. In 1999, she played DuJour (the White Rabbit Girl) in The Matrix.

Nicodemou made several other television appearances before joining the cast of Home and Away in 2000 as a regular cast member. She has been nominated several times for the Gold Logie as Australia's Most Popular Television Performer at the Logie Awards. In 2005, she and professional dancer Aric Yegudkin won the final of Dancing with the Stars. Also in 2005, Nicodemou (along with Kate Ritchie) was bridesmaid in Bec Cartwright's wedding to Lleyton Hewitt.

In 2007, Ada married her long time boyfriend, Chrys.

She is of Greek descent

Last name is pronounced Nico*de*mou (with the emphasis on 'de').

Won the third season of hit reality/variety show, "Dancing with the Stars" (2004) with her dance partner Aric Yegudkin

In August 2006, Ada announced her engagement to Sydney restaurateur Chrys Xipolitas.

Ada deferred her tertiary studies for a year whilst she finished Heartbreak High.

At 15, she auditioned for a new show called Heartbreak High and in March of the following year, when she was about to turn 16, they called her in for a 12 week guest stint. This short stint turned into a 3 year role where she played a character called Katarina.

Her first break in television at 13 years of age, was on Home & Away, doing 'extra' work, which gave her the opportunity to see the behind-the-scenes workings of a television series.

She joined the 'Johnny Young Talent School' and a dance show group called 'Kids Unlimited'. It was after joining these groups that she decided to get an agent.