Report: Lindsay Lohan, Heath Ledger secretly dating at time of his death

File this under freaky: Us is reporting today that Lindsay Lohan was dating actor Heath Ledger back in January 2008 at the time of his death.

The romance was a closely held secret, but was somehow discovered through a recorded phone call between her mother, Dina, and father/ex-husband Michael Lohan.

News of Ledger's death was devastating to Lindsay, her mom says.

Ledger died at age 28 on January 22, 2008 from an accidental but toxic overdose of prescription drugs. The way he died made Lindsay's mom nervous.

"When she's drunk or takes an Adderall with it she will do something like Heath Ledger did in a second without thinking," she tells Michael Johan on the tape, according to Us.

It's not immediately known who released the tape of the phone conversation. Lindsay had recently criticized her father for leaking other tapes. "He's disgusting to do this," she wrote on Twitter. "It really hurts my mom for me and my siblings."