But Emma Watson proved she could grab the limelight just as effectively as Madonna last night as she arrived for the premiere of Harry Potter and the Goblet of Fire.
In an embroidered white chiffon gown, white headband and sequinned gold slippers, the young actress wowed the 7,000 fans who had gathered in the rain to catch a glimpse of their favourite stars - not to mention the waiting photographers.
"I looked everywhere for the perfect dress and then I found this vintage 1920s dress in a shop in Notting Hill and I fell in love with it," she said.
Despite the attention lavished on the young actress, 47-year-old Madonna was not to be outdone. As ever, she proved she was abreast of trends by arriving in this season's must-have colour - purple.
Added to the knee-high purple leather boots she first wore to the MTV Europe Music Awards last week were velvet cropped trousers in the same shade and matching jacket with a dark velvet trim.
The singer, one of many celebrities to grace the first screening of the fourth film in JK Rowling's series, took her nine-year-old daughter Lourdes along.
Katie Leung, the 18-year-old who won the part of Cho Chang, Harry's first love interest, at an open audition, admitted she has taken even more drastic steps to avoid forgetting her humble roots.
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