Kevin Costner sent secret letters to his friend and The Bodyguard co-star Whitney Houston after the troubled singer’s aides asked him to boost her morale during the lowest times of her life.

Kevin Costner, 57, who paid tribute to Whitney Houston at her funeral in February, admits he reached out to the tragic star in letter form, but still has no idea if she read his notes.

Kevin Costner sent secret letters to Whitney Houston after her aides asked him to boost her morale during the lowest times of her life

In a taped TV interview with U.S. newsman Anderson Cooper, Kevin Costner says: “A couple of times there were some people that really loved Whitney and… during the last seven or eight years (they) asked me would I write her a letter… so I did; there were two occasions but I don’t know if those letters were ever read.”