Keisha Castle-HughesKeisha Castle-HughesShe was the youngest ever nominee for a best actress Oscar.

And now Whale Rider star Keisha Castle-Hughes' tender years are raising eyebrows once again.

That's because the 16-year-old actress has announced that she's pregnant, with a baby due next spring.

Keisha, who also played the Queen of Naboo in Star Wars: Episode III - Revenge Of The Sith, is expecting the baby with her 19-year-old boyfriend Bradley Hull.

The couple have been dating for three years, although they kept it hush-hush in case it harmed Keisha's screen image. (No worries about that now.)

It's still unclear whether the pair plan to tie the knot. But the Australian-born actress is said to be "delighted".

A pal told The Sun: "She is thrilled that she is going to be a mum."

Keisha has recently finished work on religious movie The Nativity Story - in which she plays another gal whose pregnancy came as a bit of a shock... the Virgin Mary.