Falling in love isn’t easy and for the couples of “90 Day Fiancé: Before The 90 Days” Season 4, their cultural differences and pasts will test whether their relationships can go the distance.

When the TLC series airs on Sunday night, viewers will be introduced to eight couples, who are ready to see if marriage should be the next step in their relationship with their foreign lover.

Before tuning in to the “90 Day Fiancé: Before The 90 Days” Season 4 premiere, learn more about the cast of the TLC series.

Darcey, 45 (Middletown, Connecticut.) and Tom, 39 (United Kingdom)

Darcey’s relationship will be featured on “90 Day Fiancé: Before the 90 Days” Season 4. TLC

Darcey and Tom will return to the “90 Day Fiancé” universe to see if they can make their relationship work. Last season the couple met for the first time after speaking online for four years. Although they were able to spend time together, they had their fair share of issues. This season the couple will work on their problems and see if it will help them build a solid relationship.

Geoffrey, 41 (Knoxville, Tenn.) & Varya, 30 (Russia)

Following the tragic loss of his son and the end of his second marriage, Geoffrey felt hopeless. However, after he met Varya on a dating site, and the two bonded over the love for adventure, he thought he met his perfect match. However, Geoffrey wants to fly to Russia and prove to Varya’s family that he is worthy of her love.

Avery, 32 (Seattle) & Ash, 38 (Australia)

Ash and Avery’s physical attraction to one another eventually turned into love, but the couple isn’t sure whether their relationship is ready to be taken to the next level. Ash’s career as a relationship coach has become an issue for Avery, who is concerned about how he conducts business with his female clients. Will Ash help Avery overcome her doubts about his commitment and prove he is the perfect man?

David, 60 (Las Vegas, Nev.) & Lana, 27 (Ukraine)

After swearing off American women, David joined a Ukrainian dating site where he met Lana. After speaking to one another online for seven years, David plans to make his fourth trip to the Ukraine. David, who has spent roughly $100,000 on Lana, has tried to meet her on three other occasions, but she backed out the trip each time. David is giving Lana one last chance to meet in person or he will end their relationship for good. Will Lana prove to David that she was worth the wait, or will he be left disappointed once again?

Ed, 54 (San Diego) & Rosemarie, 23 (Philippines)

Ed’s relationship will be featured on “90 Day Fiancé: Before the 90 Days” Season 4. TLC

Ed hasn’t been in a relationship in the last 28 years and is ready to love again. However, his 31 year age gap with Rosemarie and the disapproval of Ed’s only daughter may threaten their happily ever after.

Lisa, 52 (York, Pa.) & Usman “SojaBoy,” 30 (Nigeria)

Lisa was immediately smitten when she stumbled across Usman’s profile on social media. She later learned that he is a famous musician in Nigeria, and he even wrote a song about her. Unfortunately, Lisa can’t hide her jealousy over Usman’s female fans and has had trouble accepting his career. Will Lisa be able to win over Usman’s family and prove she’s strong enough to handle his lifestyle?

Yolanda, 51 (Las Vegas, NV) & Williams, 40 (England)

After Yolanda’s husband passed away, she took on a healthier lifestyle and lost 150 pounds. She shared her transformation online and caught the eye of William, who messaged her. They began an online relationship but haven’t had a video chat during the four years they have been together. Although Yolanda is excited to travel to the UK to meet the man of her dreams, her daughter is worried William will catfish her mother. Will William turn out to be the perfect guy for Yolanda, or will her she realize her daughter was right to doubt her overseas lover?

Stephanie, 29 (Yonkers, NY) & Erika, 24 (Australia)

Stephanie’s relationship will be featured on “90 Day Fiancé: Before the 90 Days” Season 4. TLC

As a social media influencer, Stephanie didn’t consider the idea of finding love online until she entered into an online relationship with one of her fans, Erika. The two have been together for the past three months, and Stephanie plans to leave New York to meet the woman she loves. However, getting her family to accept her decision may be difficult since she has not told them about her sexual orientation and has a rare bone marrow disorder.

“90 Day Fiancé: Before the 90 Days” Season 4 premieres Sunday at 8 p.m. EST on TLC.