Sutton Foster makes big reveal about 'Younger' Season 4 ahead of premiere

"Younger" fans, get ready: Season 4 is about to be very different!

We caught up with the cast ahead of this week's season premiere of the TV Land hit, and the show's star, Sutton Foster, revealed to us that her character Liza and Nico Tortorella's Josh "spent a lot of the season apart."

SEE ALSO: Hilary Duff reveals why Season 4 of 'Younger' will be 'stressful' for viewers

"I was sort of stressed out when I was filming the first couple of episodes because I felt like I was on pins and needles," she told us. "It was like, 'Can't we get back to when it was all fun and everyone liked me?!' Liza and Josh are kind of apart. We spend a lot of the season apart."

The reveal comes after Season 3's shocking finale in which Liza cheats on Josh with her boss, Charles, just as Josh was planning on proposing to her.

"Everything feels like it's at a boiling point," Foster said of where everything stands heading into Season 4.

See photos of Sutton Foster:

And she's right: The show ended on a major cliffhanger as Liza tells Hilary Duff's Kelsey her burning secret. Viewers have been waiting patiently to find out how Kelsey reacts to the news, and Foster said that it's not a very positive conversation.

"Kelsey doesn't take it well," Foster said. "But I didn't expect her to! I think Liza knew this [wasn't] going to go well and, honestly, I think at the end of Season 3, Liza is kind of like throwing a grenade into her life."

But, at the end of the day, it's important that Kelsey eventually comes around to forgiving Liza.

"The relationship between Liza and Kelsey is the heart of the show," she told us.

Watch our full sit-down with Sutton Foster in the video above.

"Younger" Season 4 premieres on Wednesday, June 28 at 10 p.m. EST on TV Land.

See photos of Hilary Duff:

More from AOL.com:
'Real Housewives of Potomac' star Karen Huger sets the record straight on moving out of Potomac
Laverne Cox: 'I feel more included than I ever have as a trans woman of color in the LGBTQ community'
'Black-ish' star Anthony Anderson gushes about Yara Shahidi, says he feels no pressure to be political