Sisters Tia Mowry-Hardrict and Tamera Mowry-Housley turned the big 4-0 and celebrated with a 70s-themed throwback birthday party on Saturday, reports PEOPLE.

The soul sisters, born on July 6, dressed the part by wearing Afro wigs and bell-bottom pants while sharing good times surrounded by close friends and family at Davey Wayne’s in Hollywood.

The siblings admitted since their busy lives keep them from hanging out like they used to when they were younger, the joint birthday celebration was a great way to party like it was 1999 – which was actually the year their popular TV show, Sister Sister, ended.

“We live very kind of busy lives and I really wanted us to slow things down for a minute and take the time out to celebrate,” Mowry-Hardrict exclusively told PEOPLE.

“The last time we had a party together was when we turned 21. We have our individual careers, but I just felt like it was something we needed to celebrate together.”

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“We didn’t miss a beat,” Mowry-Housley added. “It was kind of like when you’re with your friend that you hadn’t seen in a long time and you get together and it didn’t feel any different. It felt like it was just yesterday.”

Both sister have gone on to have successful careers creating their individual destinies in Hollywood. Nonetheless, they took it to the old-school for their party, grubbing on party favorites like hotdogs, hamburgers and grilled cheese sandwiches and they enjoyed a retro birthday cake by Dani Flowers Bakery.

“We were both able to relax and just be together with our friends for like three hours,” said Mowry-Housley. “My sister and I were just on the same page and it was awesome.”

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The ladies were joined by their families: Tia’s husband Cory Hardrict and 6½-year-old son, Cree Taylor, and 2-month-old daughter, Cairo were there as well as Tamera’s husband Adam Housley and 5-year-old son, Aden, and 3-year-old daughter, Ariah.