Who's the big film star?

She's shared screen time with Robert de Niro, is starring in the biggest film of the summer and Tom Cruise has swept her off her feet - it's no wonder child actor Dakota Fanning can't stop smiling.

The 11-year-old American appeared alongside co-star Cruise and director Steven Spielberg at the world premiere of War Of The Worlds in Japan.

And with current beau Katie Holmes busy promoting Batman Begins in Britain, Cruise was only too happy to let his young colleague hog the limelight.

Fanning plays Cruise's daughter Rachel Ferrier in the sci-fi blockbuster, which hits British cinemas on July 1.

Born in Georgia, Fanning's debut came in 2000, at just seven years old, when she played a car accident victim in cult TV series ER.

Later, she enjoyed a guest appearance in Friends and starred in the Robert de Niro thriller Hide and Seek.

In 2001, she became the youngest person to ever be nominated for a Screen Actors Guild Award, for her role as Sean Penn's daughter in I Am Sam.

Fanning has just finished work on her first lead role, playing Fern Arable in Charlotte's Web. The film adapted from the children's classic by EB White is due to be released next year.