Here's a Happy 30th Birthday to the Olsen twins!

On Monday, Mary-Kate and Ashley have officially begun their new generation in their thirties. And for being so young, they've conquered a lot in their careers.

They started off acting when they were babies with their infamous shared role as Michelle Tanner on Full House. This led into more acting in sitcoms as well as videos where they played detectives.

As teenagers, they played characters that traveled all over the world. And as adults, they left the acting world behind and moved into fashion with their own label titled The Row.

When the Netflix revival Fuller House was announced, there were rumors all over the place in the Olsen twins would join or not. It turned out that they didn't show up at all, something their co-star John Stamos dished on with Howard Stern on Sirius XM earlier this year.

"I think there was some confusion," Stamos said via E! News. "They said first I didn't ask them. And I didn't personally, but I was told they were asked. So I had a knee-jerk reaction and said, 'Bulls--t, I did ask them.' And they got upset, so I did call and talked to Mary-Kate and explained what the show is going to be and told them I'd love them to be on there and they decided not to, which I respect."

The actor added that Mary-Kate and Ashley have just moved on from acting and didn't feel the need to be part of the series.

"They seemed very into it. They just were afraid of acting. They don't consider themselves actresses," Stamos said. "I said maybe you guys will be in New York and we'll do a phone call or something and they were like, 'Let us think about it,' and it just wasn't for them."