Margot Robbie said she used her movie earnings to pay off her mother's mortgage after her mom financially supported her earlier in her career

• Margot Robbie told CBS that she used her movie earnings to pay off her mother's mortgage.

• Robbie said her mother initially supported her acting career by taking money out of the mortgage.

• The "Barbie" star paid off her mom's entire mortgage for her 60th birthday.

Margot Robbie said that she used her movie earnings to pay off her mother's mortgage after her mom financially supported her earlier in her career.

In an interview on "CBS Sunday Morning" about her new hit movie "Barbie," Robbie said that she always intended to give money to her mother, Sarie Kessler, because Kessler lent Robbie money from the mortgage to help Robbie when she started acting.

"Everything I owed my mom I had it written down," the 33-year-old actor and producer said. "I have that piece of paper still. I kept it."

News.com.au first reported in 2014 that Robbie paid off the mortgage on Kessler's $490,000 home in Southport, Australia, in 2014 for her mother's 60th birthday.

"She'd take money out of the house mortgage, lend me money, so I always knew, I was like, 'I got to pay that back,'" said Robbie. "And then one day, when I made enough money, I just paid that whole mortgage off completely. I was like, 'Mom, don't even worry about that mortgage anymore. It doesn't even exist anymore.'"

Robbie added: "Honestly, anyone in my position, you'd do that for your mum."

This was a year after Robbie's breakout role in "The Wolf of Wall Street," which launched her to movie stardom.

In the past, Robbie has spoken about turning to her mother for career advice.

Last year, Robbie told Vanity Fair that she struggled with the level of fame she achieved after "The Wolf of Wall Street."

"Something was happening in those early stages and it was all pretty awful, and I remember saying to my mom, 'I don't think I want to do this,'" Robbie said, describing the time as one of her lowest moments.

"She just looked at me, completely straight-faced, and was like, 'Darling, I think it's too late not to.' That's when I realized the only way was forward," she added.

"Barbie" is in theaters now.

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