Tammin Sursok is an Australian actress. She started her professional career in the 2000s, starring as Dani Sutherland in the Aussie soap opera Home and Away. She starred on the show from 2000-2004. She later made her big screen debut in the film Aquamarine. Soon, she ventured a career in Hollywood, first appearing in an episode of Rules of Engagement. Her first notable role in the US was as Colleen Carlton in the soap opera The Young and the Restless, starring on the show from 2007-2009. Following this, she starred in the made-for-television film Spectacular!. In the 2010s, she became known for playing Siena in Hannah Montana and Jenna Marshall in Pretty Little Liars.