Lisa Marie Presley's youngest daughters' father requests estate representation.

In Nashville, Tennessee, during the 2013 CMT Music Awards, Lisa Marie Presley strikes a portrait-taking pose.

The petition Priscilla Presley filed in January contesting the legality of her daughter Lisa Marie Presley's will was the subject of a court hearing in Los Angeles on Thursday.

Both Priscilla Presley and her granddaughter Riley Keough,

an actor and the main heir to Lisa Marie Presley's estate, were absent from the hearing.

On Thursday, the court took into account an ex parte petition submitted by Michael Lockwood, the father of twins Finley and Harper,

who are Lisa Marie Presley's youngest daughters, asking to be appointed as their guardian ad litem with regard to their mother's will.

Lockwood's attorney Scott Rahn declared that he is "ready, able, and willing to protect their interests."

Riley Keough and Priscilla Presley's legal representatives did not object to Lockwood being named as their guardian ad litem.