David Letterman sucked Jennifer Aniston’s hair in an old interview (Picture: Fox)

David Letterman has come under fire for sucking on a strand of Jennifer Aniston’s hair during an interview in 1998.

After the 73-year-old was called out for his 2013 interview with Lindsay Lohan where he repeatedly asked the actress about her stints in rehab, the internet dug out another ‘disturbing’ piece of footage from The Late Show.