A rarely seen John Brack painting from the same series as Australia's most expensive painting will headline Sotheby's upcoming Important Australian Art sale, with an estimate of more than $1 million.

Junior Latin American was one of the four largest paintings from Brack's Ballroom Dancing series, exhibited at the Rudy Komon Art Gallery in 1970. Of the 12 paintings and 10 smaller works in this exhibition, Junior Latin American was the only one not to feature adult dancers.