10 very important things we learnt from Lindsay Lohan and Jamie Lee Curtis' Freaky Friday reunion.

Call me a crypt-keeper but I am feeling OLD after realising it’s been 20 whole years since the utterly iconic pairing of Jamie Lee Curtis and Lindsay Lohan took over our screens.

The 2003 hit Freaky Friday became a total cultural phenomenon when the on-screen mum-and-daughter duo switched bodies, leaving us with plenty of epic lines, from "MAKE GOOD CHOICES!" to "Get away from me you clone freak!"

Now, two decades later, our sequel dreams are coming true, with Disney confirming that a second film is in development, and the actresses saying they are well and truly on board.

Watch the preview for Freaky Friday. Story continues after video.

The two teamed up for a three-way call with the New York Times recently and FACTS WERE LEARNT.

1. The Parent Trap helped Lohan play an adult in a 15-year-old’s body.

"As an 11-year-old, The Parent Trap felt so big to me," Lohan said. 

"I threw myself into everything: accents, green screens, playing two different people. So I felt comfortable after that." 

2. Curtis was not the producers' first choice.

"I was in the middle of a book tour when my agent called," Curtis said. 

"An actress had been involved in the movie and chose not to do it. I was a replacement part. That was Thursday. I read the script on Friday, flew home on Saturday, had my hair dyed red Sunday, and was working Monday – with a 15-year-old and a five-year-old at home – playing a 15-year-old. Had I had all the time in the world to prepare, I don’t think it would’ve been so good. I just had to be in my body."

3. It was Lohan who brought the "punk" on set.

"This was the era of Avril Lavigne and punk, and I wanted to experience it," Lohan explained. 

"We did white stripes in my hair. I put [colourist] Tracey Cunningham through hell because I took my nice red hair and just bleached it."

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4. Jamie Lee Curtis went sober before taking on the role.

"I was also newly sober and I was able to have a community within the movie-work world," Curtis said. "That was a big deal for me."

5. It was "game on" from the moment Curtis met Lohan.

"We met in an office, did the read-through, and it was game on in a big way," explained Curtis. 

"I had to let go of every control mechanism and just let it fly. Lindsay was as fluid as I was. If you look at The Parent Trap, she has a facility as an actor that is really impressive. It was a big job. It was a big production. And our relationship was very easy."

6. Curtis helped Lohan through her first kiss.

"Jamie showed up with such an infectious personality [and] immediately took me under her wing," Lohan said. 

"I was so nervous to do my first kiss on camera, so she talked to me in my trailer and made it funny so that I wouldn’t stress about it."

7. Both Curtis and Lohan had trouble speaking.

"One big thing was slowing down my speech," said Lohan. 

"I would tell Jamie, 'Remind me if I’m going too fast.' And she would say, 'Should I do this more slang?' We were feeling it on a daily basis."

Listen to the hosts of Mamamia Outloud discuss what gets a woman 'cancelled'. Post continues after podcast.

8. Curtis was told her performance was "too big".

"The first day, we shot the scene where we pull up to the school," Curtis said. 

"I’m the teenager and I’m completely flummoxed because this hot guy [played by Chad Michael Murray] is walking over. My body freezes up. 

"[The director] Mark came up to me the next day and said, 'My editor is wondering if the performance is a little big.' I looked at him and said, 'My instinct is all I have to go with. If you don’t like what I’m doing, fire me. I will regret dying my hair red, and other than that, it will be fine. But this is what I’m going to do.'

"Years later, I was at the Aero Theatre and the editor, who was sitting in front of us, said, 'By the way, I was so wrong.'"

9. Lohan and Curtis have a secret code to identify themselves.

"My strongest memory is the scene where the two of us are in the car eating French fries," Curtis said. 

"Now, if I get a text out of the blue, 'Hey, Jamie, it’s Linds,' I say, 'Prove it, what was the song we were trying to learn the rap to during Freaky Friday?' 

"If she answers Justin Timberlake’s 'Like I Love You', then I know it’s Lindsay Lohan."

10. Both of the stars are up for a sequel!

"As I went around the world with Halloween Ends, people wanted to know if there was going to be another Freaky Friday," said Curtis. 

"Something really touched a chord. When I came back, I called my friends at Disney and said, 'It feels like there’s a movie to be made.'"

"Jamie and I are both open to that," Lohan added. 

"So we’re leaving it in the hands that be. We would only make something that people would absolutely adore."

Image: Disney/Getty.