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:

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Sutton Foster out and about
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Sutton Foster out and about
NEW YORK, NY - JUNE 11: Actress Sutton Foster attends the 71st Annual Tony Awards at Radio City Music Hall on June 11, 2017 in New York City. (Photo by Jim Spellman/WireImage)
NEW YORK, NY - MAY 07: Debi Mazar and Sutton Foster attend 32nd Annual Lucille Lortel Awards at NYU Skirball Center on May 7, 2017 in New York City. (Photo by Walter McBride/FilmMagic)
NEW YORK, NY - JUNE 11: Sutton Foster and Gavin Creel attend the 2017 Tony Awards at Radio City Music Hall on June 11, 2017 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Tony Awards Productions)
NEW YORK, NY - APRIL 26: Sutton Foster, Hilary Duff and Molly Bernard are seen filming 'Younger' on April 26, 2017 in New York, New York. (Photo by Alessio Botticelli/GC Images)
NEW YORK, NY - APRIL 02: Ted Griffin and Sutton Foster attend 'The Play That Goes Wrong' Broadway Opening Night at the Lyceum Theatre on April 2, 2017 in New York City. (Photo by J. Kempin/Getty Images)
NEW YORK, NY - FEBRUARY 07: Sutton Foster introduces the latest innovation from Amope GelActiv Insoles & Inserts at the ShoeLove Fashion Truck on February 7, 2017 in New York City. (Photo by Mike Coppola/Getty Images for Amope)
NEW YORK, NY - JANUARY 26: TV Land's 'Younger' Star Sutton Foster attends the Bronwen Smith of B Floral Hosts a Private Winter Wonderland Event at Studio Arte in NYC at Studio Arte on January 26, 2017 in New York City. (Photo by Dave Kotinsky/Getty Images for B Floral)
NEW YORK, NY - DECEMBER 04: Ted Griffin and Sutton Foster attend 'Dear Evan Hansen' opening at Music Box Theatre on December 4, 2016 in New York City. (Photo by Jenny Anderson/FilmMagic)
NEW YORK, NY - NOVEMBER 20: Sutton Foster attends the Opening Night Party for The New Group Production of 'Sweet Charity' at The Lindeman on November 20, 2016 in New York City. (Photo by Walter McBride/WireImage)
NEW YORK, NY - OCTOBER 17: Ted Griffin and Sutton Foster attend The 10th Annual Golden Heart Awards Celebration on October 17, 2016 in New York City. (Photo by Patrick McMullan/Patrick McMullan via Getty Images)
NEW YORK, NY - OCTOBER 10: (L-R) Actors Nico Tortorella, Miriam Shor, Molly Kate Bernard, Sutton Foster, Peter Hermann, executive producer/writer Dottie Dartland Zicklin and creator/ executive director Darren Star attend the PaleyFest New York 2016 screening of 'Younger' at The Paley Center for Media on October 10, 2016 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
NEW YORK, NY - OCTOBER 17: Actress Sutton Foster attends the 2016 God's Love We Deliver Golden Heart Awards Dinner at Spring Studios on October 17, 2016 in New York City. (Photo by Ben Gabbe/Getty Images)
NEW YORK, NY - OCTOBER 10: Actress Sutton Foster attends the PaleyFest New York 2016 screening of 'Younger' at The Paley Center for Media on October 10, 2016 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
Actress Sutton Foster attends the 'Younger' Season 3 & 'Impastor' Season 2 New York Premiere at Vandal on September 27, 2016 in New York City. / AFP / ANGELA WEISS (Photo credit should read ANGELA WEISS/AFP/Getty Images)
Actors Nico Tortorella and Sutton Foster attend the 'Younger' Season 3 and 'Impastor' Season 2 New York Premiere at Vandal on September 27, 2016 in New York City. / AFP / ANGELA WEISS (Photo credit should read ANGELA WEISS/AFP/Getty Images)
NEW YORK, NY - OCTOBER 04: Joel Perez and Sutton Foster pose at The New Group Theatre Production photo call for 'Sweet Charity' at Manhattan Movement & Arts Center on October 4, 2016 in New York City. (Photo by Bruce Glikas/Bruce Glikas/Getty Images)
THE CHEW - Sutton Foster and Alton Brown are guests on 'The Chew,' Tuesday, September 27, 2016. 'The Chew' airs MONDAY - FRIDAY (1-2pm, ET) on the ABC Television Network. (Photo by Jeff Neira/ABC via Getty Images) CLINTON KELLY, SUTTON FOSTER
NEW YORK, NY - SEPTEMBER 26: (L-R) Miriam Shor, Nico Tortorella, Molly Bernard, Peter Hermann, Hilary Duff, Debi Mazar, and Sutton Foster attend the Build Series to discuss 'Younger' at AOL HQ on September 26, 2016 in New York City. (Photo by Mike Pont/WireImage)
NEW YORK, NY - SEPTEMBER 26: Actress Sutton Foster visits the SiriusXM Studios on September 26, 2016 in New York City. (Photo by Cindy Ord/Getty Images)
NEW YORK, NY - SEPTEMBER 26: Sutton Foster attends the Build Series to discuss 'Younger' at AOL HQ on September 26, 2016 in New York City. (Photo by Mike Pont/WireImage)
WASHINGTON, DC - JULY 03: Tony Award winner and television star Sutton Foster poses for a photo with Tom Bergeron during A Capitol Fourth - Rehearsals at U.S. Capitol, West Lawn, on July 3, 2016 in Washington, DC. (Photo by Paul Morigi/Getty Images for Capital Concerts)
MATCH GAME - Airdate: June 26, 2016 - The iconic panel game show MATCH GAME, hosted by Golden Globe and Emmy Award-winning actor Alec Baldwin, returns to primetime airing on SUNDAYS beginning June 26th (10-11pm, ET) on the ABC Television Network. (Photo by Heidi Gutman/ABC via Getty Images) SUTTON FOSTER
NEW YORK, NY - APRIL 25: Sutton Foster attends The Actors Fund 2016 Gala at Marriott Marquis Times Square on April 25, 2016 in New York City. (Photo by Walter McBride/WireImage)
WEST HOLLYWOOD, CA - APRIL 15: Actors Miriam Shor, Peter Hermann and Sutton Foster of TV Lands Younger attend the 'Younger' FYC Screening & Reception at The London West Hollywood on April 15, 2016 in West Hollywood, California. (Photo by Tommaso Boddi/Getty Images for TV Land)
SANTA MONICA, CALIFORNIA - APRIL 10: Actress Sutton Foster attends the TV Land Icon Awards at The Barker Hanger on April 10, 2016 in Santa Monica, California. (Photo by Paul Archuleta/FilmMagic)
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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:

27 PHOTOS
Hilary Duff out and about
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Hilary Duff out and about
NEW YORK, NY - JUNE 19: Singer/Actress Hilary Duff is seen is seen walking in Midtown on June 19, 2017 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - JUNE 19: Singer/Actress Hilary Duff is seen is seen walking in Midtown on June 19, 2017 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - JUNE 13: Actress Hilary Duff is seen filming 'Youger' in Union Square on June 13, 2017 in New York City. (Photo by Gotham/GC Images)
NEW YORK, NY - JUNE 12: Actress Hilary Duff is seen filming 'Younger' in Union Square on June 12, 2017 in New York City. (Photo by Gotham/GC Images)
NEW YORK, NY - JUNE 13: Actress Hilary Duff is seen filming 'Youger' in Union Square on June 13, 2017 in New York City. (Photo by Gotham/GC Images)
NEW YORK, NY - JUNE 12: Actress Hilary Duff is seen filming 'Younger' in Union Square on June 12, 2017 in New York City. (Photo by Gotham/GC Images)
NEW YORK, NY - APRIL 26: Hilary Duff and Molly Bernard are seen filming 'Younger' on April 26, 2017 in New York, New York. (Photo by Alessio Botticelli/GC Images)
NEW YORK, NY - APRIL 05: Actress Actress Hilary Duff is seen walking in Soho on April 5, 2017 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - MARCH 07: Actress Hilary Duff attends a toast to Michele Promaulayko, the new Editor-In-Chief of Cosmopolitan, on March 7, 2017 in New York City. (Photo by Astrid Stawiarz/Getty Images for Cosmopolitan)
NEW YORK, NY - MARCH 07: Hilary Duff attends the Callie Collection Wines launch event with Hilary Duff at La Sirena on March 7, 2017 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Callie Collection)
LOS ANGELES, CA - FEBRUARY 28: Hilary Duff is seen on February 28, 2017 in Los Angeles, California. (Photo by BG015/Bauer-Griffin/GC Images)
LOS ANGELES, CA - FEBRUARY 22: Hilary Duff brightens up her blonde with celebrity hairstylist, Riawna Capri and Joico's Blonde Life on February 22, 2017 in Los Angeles, California. (Photo by Tiffany Rose/WireImage)
LOS ANGELES, CA - FEBRUARY 01: Hilary Duff is seen on February 01, 2017 in Los Angeles, California. (Photo by BG015/Bauer-Griffin/GC Images)
LOS ANGELES, CA - JANUARY 28: Hilary Duff arrives at the Entertainment Weekly hosts celebration honoring nominees for The Screen Actors Guild Awards held at Chateau Marmont on January 28, 2017 in Los Angeles, California. (Photo by Michael Tran/FilmMagic)
WEST HOLLYWOOD, CA - JANUARY 27: Actress Hilary Duff attends Harper's Bazaar Celebrates 150 Most Fashionable Women at Sunset Tower Hotel on January 27, 2017 in West Hollywood, California. (Photo by Frazer Harrison/Getty Images)
LOS ANGELES, CA - JANUARY 09: Hilary Duff is seen on January 09, 2017 in Los Angeles, California. (Photo by BG009/Bauer-Griffin/GC Images)
BEVERLY HILLS, CA - JANUARY 08: Actress Hilary Duff arrives at the 18th Annual Post-Golden Globes Party hosted by Warner Bros. Pictures and InStyle at The Beverly Hilton Hotel on January 8, 2017 in Beverly Hills, California. (Photo by Gregg DeGuire/FilmMagic)
LOS ANGELES, CA - DECEMBER 08: Hilary Duff is seen on December 08, 2016 in Los Angeles, California. (Photo by BG015/Bauer-Griffin/GC Images)
LOS ANGELES, CA - NOVEMBER 13: Hilary Duff and Jason Walsh are seen at LAX on November 13, 2016 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
LOS ANGELES, CA - OCTOBER 30: Actress Hilary Duff attends Entertainment Weekly's Popfest at The Reef on October 30, 2016 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - OCTOBER 27: Hilary Duff is seen on October 27, 2016 in Los Angeles, California. (Photo by BG005/Bauer-Griffin/GC Images)
LOS ANGELES, CA - OCTOBER 30: Actor Nico Tortorella and actress Hilary Duff attend Entertainment Weekly's Popfest at The Reef on October 30, 2016 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
NEW YORK, NY - SEPTEMBER 28: Singer/Actress Hilary Duff is seen walking in Soho on September 28, 2016 in New York City. (Photo by Raymond Hall/GC Images)
LOS ANGELES, CA - SEPTEMBER 29: Hilary Duff is seen at LAX on September 29, 2016 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
NEW YORK, NY - SEPTEMBER 27: Peter Hermann, Miriam Shor, Hilary Duff, Molly Bernard, Debi Mazar, Sutton Foster and Nico Tortorella attends the 'Younger' Season 3 & 'Impastor' Season 2 New York Premiere at Vandal on September 27, 2016 in New York City. (Photo by Walter McBride/FilmMagic)
NEW YORK, NY - SEPTEMBER 26: Hilary Duff attends the Build Series to discuss 'Younger' at AOL HQ on September 26, 2016 in New York City. (Photo by Mike Pont/WireImage)
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