Heather Truscott (Heather Locklear) is Lilly's mother. She first appears at a PTA meeting at the Stewarts' home in "Lilly's Mom Has Got It Goin' On".
She goes on a date with Robby, but things turn cold when she refuses to let Robby pay for her meal. Miley describes Heather as "uptight," and Lilly eventually agrees with her. She reconciles with Robby, but they are no longer seen dating. Which is obviously because Robby was unknowingly using her as a rebound to get over his dead wife. Heather gets a job in Atlanta forcing Lilly to move. She attends a Hannah concert dressed as Lola Luftnagle's mother (which means that she knows about Miley's secret). She is divorced from Lilly's father.
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Heather Truscott dressed as Lola Luftnagle’s mother
Lola and Lola's Mother