Tate Modern has promised free entry to its key summer exhibition, Frida Kahlo, to visitors under the age of 18.
Kahlo's work was re-discovered by collectors in the 1980s
The gallery, which is celebrating its fifth birthday, hopes to attract greater numbers of young people to the museum on London's Bankside.
School groups will also be given free entry to the exhibition of the Mexican painter's work. Adult entry costs £10.
Last year the Tate Modern welcomed more than 4.1m visitors, 60% of whom were under 35.
If the Kahlo initiative proves popular, the Tate aims to make more exhibitions free to under-18s in the future.
More than 20 million people have visited the contemporary art gallery, housed in a disused power station, since it opened in 2000 - double the original expectations.
"In just five years Tate Modern has gone from being a noble ruin to one of the world's outstanding galleries of modern art," said Tessa Jowell, Secretary of State of for Culture, Media and Sport.
"The building and its contents belie the notion that there is no widespread appetite for serious art."
Frida Kahlo, a celebrated figure in her native Mexico, has become increasingly popular among international collectors in recent years.
Championed by pop star Madonna, who is lending two Kahlo works to the Tate exhibition, the artist was also the subject of a high profile film about her life, starring Salma Hayek.
Initially overshadowed by her husband, muralist Diego Rivera, she is now considered one of the most significant artists of the 20th Century.
The exhibition, featuring some 60 oil paintings, opens on 9 June and runs until 9 October.