Los Angeles: Lindsay Lohan and David Letterman had fun at the expense of Oprah Winfrey by prank calling her on The Late Show.


Oprah Winfrey. Pic/AFP 

The clip sees Letterman place a personal call to Winfrey at Lohan's request, and pretend to pose as the actress's secretary, reported Ace Showbiz. Winfrey is heard questioning Letterman about who he actually is, before the comedian reveals the prank.