Millar received a Bachelor of Fine Arts in 1980 and an Master of Fine Arts from Auckland University"s in 1983. As recipient of a Scholarship from the Italian Government in 1990, she spent a year in Turin, Italy, where she studied Italian arts of the 1960s and 1970s.
2009 Creative New Zealand Visual Arts Residency in New York, International Studio & Curatorial Program (ISCP), New York Millar has had numerous solo and group exhibitions in both New Zealand and Europe and found critical acclaim in the international press Selected Solo 2005 I Will, Should, Can, Must, May, Would Like to Express, Auckland Art Gallery, Auckland 2006 Something, Nothing, 64zero3, Christchurch 2007 Keeping You You, Keeping Maine Maine, Lopdell House Gallery, Waitakere City 2008 Matt Black, Galerie Mark Müller, Zurich, Switzerland 2009 Giraffe-Bottle-Gun, New Zealand Pavilion, Venice Biennale, Venice, Italy 2015 The Model World, Te Uru Auckland Her painterly style was described as "energetic and overwhelming", and Andrea Hilgenstock calls her paintings "spectacular". Further references can be found in recent publications on New Zealand art
She represented New Zealand at the 53rd Venice Biennial in 2009.
In 2011 she was again part of the Venice Biennale in the collateral event Personal Structures in Palazzo Bembo. Millar is represented by Gow Langsford Gallery in Auckland, Gallery Mark Müller in Zurich, Hamish Morrison Gallery in Berlin, and Sullivan Strumpf, Sydney.
