Just wait until they find out about Ryan and Sandra.

Gen Z learned a big lesson from millennials this past week about former celeb couples.

It appears theyjust discoveredthatLindsay Lohanand Samantha Ronson dated.

Professor lecturing in a classroom filled with students, with the prof representing "annoying millennial screaming about the '90s" and the students repping "Gen Z held captive"

Screen capture of a tweet by user @sedentarysecret calling a realization that Lindsay Lohan dated "a butch in 2008/2009" "life changing information"

Sam and Lindsay embracing

Christina smiling in a strapless white gown and Chris in a black suit and tie, walking on a staircase

Serena in a green dress with Brett in a black suit at an event

Cameron using a phone and standing next to A-Rod, both casually dressed

Emma wearing a patterned top and Kieran in a black shirt

Megan in a black blazer, red top, and jeans and David in a striped shirt and jeans at a Rock the Vote event

Billy Bob in a black suit and Laura in a beaded lace dress, holding hands on the red carpet

Usher smiling and wearing sunglasses and a V-neck top and Chilli smiling and embracing

Jonny in a leather jacket and Angie in a red-striped jacket

Jessica wearing a white tank top and knit hat and Chris in a patterned sweater and jeans on the red carpet

Alannis in a mesh top and holding an award, and Ryan in a suit with an unbuttoned shirt, with his arm around her

Brigitte in an off-shoulder dress looking at Flavor Flav, in a suit with a unique helmet

Ashton wearing a dark suit and January in a metallic suit with a sheen on the red carpet

Usher wearing a graphic shirt and beanie, and Naomi in a black cap and sleeveless top, sitting at a sporting event

Wilmer in a suit and Lindsay in an embroidered dress, posing together at an event

Topher in a white T-shirt, cap, and jeans with Lindsay in a purple top and jeans on the red carpet

Lisa Marie in a printed shirt and blazer, and Nic in a cap and layered shirts, holding hands

Danny in a black top and white pants, and Cynthia in a black dress with a V-neckline and orange shoes

The pair standing side by side outdoors

On the red carpet: Mandy in a strapless black dress, Andy in a classic black suit

Sarah smiling in a strapless dress with embellishments, Jerry smiling in a classic tuxedo

Lenny and Nicole seated in a theater box together

Ryan in a shirt embracing a smiling Sandra, in a jeans jacket, at an event

On the red carpet: JLo with curly hair and wearing a lace dress, Chris in a suit

Zach in a suit and tie next to Mandy in a black dress with unique neckline at event

Harry and Chelsy sitting close together and leaning in to each other

Ben kissing Gwyneth's head

Ashton in a gray suit and white shirt, and Demi in a sleeveless black and white dress

Drew with curly hair wearing a sleeveless black gown, and Luke in a beige suit  and tie, holding hands on the red carpet

Chris and Katie smiling and wearing jeans

Chris smiling and wearing a black suit and Gabrielle smiling in a green off-shoulder top at a media event

Ricky in a pin-striped suit kisses the temple of Rebecca, who's wearing a pink ruffled dress, at a media event

Lance and Reichen smiling and posing playfully for the camera at an event

Hilary and Joel sitting and looking at each other

Justin and Cameron walking, he in a black coat and jeans and she in a dark jacket and jeans

Sarah sitting on Jimmy's lap and both smiling with a bare-chested Tracy Morgan

Blake and Kelly embracing, she in an orange dress and he in a beige suit

Brody in a cap and sneakers and Avril in a graphic tee and patterned pants exiting a building

Britney and Colin posing playfully on a red carpet; she's in a sleeveless outfit and he's in a suit with an open shirt and his arm is around her shoulders

On the red carpet: Janet is smiling in a long sleeveless,denim dress, and Matthew is in a casual shirt and jeans

Scarlett and Jack seated together, she in a patterned top and corduroys and he in a printed shirt and jeans

Jessica in a deep-V sparkling outfit at an event, surrounded by people, including John behind her

Kristen, in a black crop top, long coat, and red leather pants, with Ryan, in a casual jacket, T-shirt, and corduroys, on a red carpet