Lindsay Lohan will be a guest on ‘‘Late Show With David Letterman’’ on April 9, according to CBS. It will be her first ‘‘Late Show’’ appearance in six years. Lohan is promoting her guest appearance on the FX sitcom ‘‘Anger Management,’’ which will air two days later. On that episode, she will be playing herself, but as a therapy patient of series star Charlie Sheen. Lohan and Sheen also recently worked together in ‘‘Scary Movie 5,’’ opening this month. The actress is facing 90 days in rehab as part of a plea deal in a misdemeanor car crash case in California.
Walters mum on plans