By Nicole Sperling
Updated January 16, 2010 at 09:15 PM EST

Martin Luther King’s holiday weekend is proving to be an interesting one for the box office. For the first time in five weeks, a film has out-grossed Avatar. If early estimates hold, the Denzel Washington-starrer The Book of Eli grossed $11.7 million on Friday, while Avatar earned an estimated $10.5 million. The rest of the weekend will be closely watched to see if Avatar can maintain its record-grossing run for its fifth week in theaters. Third place for Friday went to The Lovely Bones, which expanded wide this week for the first time since it began its limited run five weeks ago. Its estimated Friday gross stood at $5.7 million. The Robert Downey Jr.-starrer Sherlock Holmes earned an estimated $2.8 million for its fourth Friday in theaters, while Alvin and the Chipmunks: The Squeakquel nabbed an additional $2.4 million. Check back here throughout the weekend for box office updates.