LONDON (AP) — Christie's is selling a Lucian Freud painting of his pregnant daughter as part of a sale representing centuries of British portraiture.

"Ib and her Husband," painted in 1992, is valued at about 18 million pounds ($29 million).

Works by Freud, who died in 2011 at 88, have sold for as much as $56 million.

The painting is part of a June 30 "Defining British Art" sale, announced Thursday, marking the 250th birthday of Christie's auction house.

Other lots include Joshua Reynolds' 1778 "Portrait of Lucy Long," valued at up to 3 million pounds ($4.4 million) and Lord Leighton's "Golden Hours" from 1864. It is valued at up to 5 million pounds ($7.3 million).

The works will be exhibited in London, Hong Kong and New York before the sale.