[1][2] She is known for playing look-alike half-sisters Lily Montgomery and Ava Benton on All My Children, and for her recurring roles on Grey's Anatomy and Gone, as well as Terminator: The Sarah Connor Chronicles, One Tree Hill, Wizards of Waverly Place, and CSI: Miami.

She was nominated for Outstanding Younger Actress in a Drama Series for her roles of Lily Montgomery and Ava Benton.

Leven filmed a pilot presentation for the CW titled Austin Golden Hour, directed by Sanford Bookstaver.

[8] In 2010, Rambin appeared as the daughter of Virginia Madsen's and David James Elliott's characters on the ABC television series, Scoundrels.

Later, Rambin was cast in the recurring role of Chloe Hall, on the long-running CW series, One Tree Hill.

Further film roles include Chasing Mavericks (2012), which is based on a real-life story about a surfer called Jay Moriarty.

Rambin later starred in the music video for Green Day's "Stray Heart" which was officially released on November 7, 2012.

In 2013, Rambin moved to New York City to study acting full-time at the Playhouse West Brooklyn Lab and is now a teacher and staff member at the school.

Rambin appeared in the comedy drama, Walter (2014) as Kendall, the main love interest of the title character.

In 2014, she landed the lead role of Kayla Canyon in the independently produced pilot, Dr. Del, opposite John Hawkes.

Later that year, she was cast in the lead role of Fern Sreaves in Tatterdemalion, an independent film co-written and directed by Ramaa Moseley.

In 2016, she was cast in a series regular role on the Hulu cult drama, The Path, opposite Aaron Paul and Michelle Monaghan.

[23] Rambin is also involved with Surf for Life, an organization that creates educational and cultural development projects in coastal communities around the world.