Kevin Costner, who co-starred with Whitney Houston in The Bodyguard, will reportedly speak at her funeral in New Jersey on Saturday.

Family sources tell People.com that the movie star will be among those delivering tributes at the service, which will be held at the New Hope Baptist Church in Newark, where Houston was once a member of the choir.

The late superstar's longtime friend and mentor Clive Davis is also expected to speak and gospel singer and pastor Marvin Winans will deliver the eulogy.

Meanwhile, ET.com has confirmed that both Aretha Franklin and Stevie Wonder will sing at the star-studded service, which will stream live on the Internet.