Los Angeles: Actress Meryl Streep is lending a helping hand to Naomi Watts, who will star in a biopic on the late Lady Diana, with some acting tips.

Streep won an Oscar for her portrayal of former prime minister Margaret Thatcher in "The Iron Lady"."Naomi is anxious about playing a character so loved by people around the world, not just in the UK," a website quoted a source as saying.

"She has asked Meryl's advice on playing such a well known figure. This is a huge challenge for Naomi and she wants to do Diana justice as well as avoid offending her family and those who have such fond memories of her," the source added.