Art twins

Links to twin artists are at http://pinterest.com/convivia/twin-artists/

Wikipedia lists some "art twins" (all these are men...interestingly...):

Os Gêmeos (1974–)

Tim (1939-2006) and Greg Hildebrandt (1939–)

Masashi and Seishi Kishimoto (1974–) 

Moses (1899–1974) and Raphael Soyer (1899–1987)

Doug and Mike Starn (1961–)

Michael McGlynn and John Mcglynn (1964-)

Jerome Witkin and Joel-Peter Witkin (1939-)

To redress the balance, some female twin artists:

the German Schmidt-Heins twins, Barbara and Gabrielle: http://www.sculpture-citynord.de/kue_schmidt_heins.htm

image and interview here

the Singh sisters in Liverpool (http://www.singhtwins.co.uk/singhtwins.co.uk/WELCOME.html)

image from here

Liesbeth and Angélique Raeven are Dutch anorexic twins who do performance art about their obsessions - "without one another we would die; we can't eat if we are separated"

http://www.videoportal.sf.tv/video?id=95185e06-c1e1-4867-83de-14b2f0d13898 [in German]
In 2002 they caused quite a stir, performing in their "thin" state (34 kilo weight) - "freak show" was the reaction - but now they are "normal" (50 kilos).

image from here

Identical twins Irina und Marina Fabrizius study in Dusseldorf and work together - on the same paintings. They were born in Kazakhstan in 1990 and live in Germany. Their website is http://www.fabrizius2.de/; article at
http://www.wz-newsline.de/lokales/duesseldorf/kultur/fabrizius-zwillinge-unzertrennlich-bis-in-die-kunst-1.887338 [in german]

And also:

Gert and Uwe Tobias come from Romania and live in Germany  - http://www.saatchi-gallery.co.uk/artists/gert_tobias.htm


Victor and Vincent Wood, who at age 10 covered the walls of their bedroom with drawings of their sports heros
http://www.twinartists.com/aboutus.html