Britney Spears' sister Jamie Lynn Spears admits their relationship has broken down

Watch: Jamie Lynn Spears discuss her relationship with sister Britney Spears

Britney Spears' younger sister Jamie Lynn Spears has admitted their relationship has broken down.

The Zoey 101 star is set to open up about the 'complicated' situation between herself and the 40-year-old Toxic singer, who was officially freed from the legal control of her family in November last year.

A trailer for Jamie Lynn's tell-all interview on Good Morning America due to air on Wednesday 12 January, shows the actor wiping away tears as she says: "I love my sister."

Read more: Britney Spears enjoys first glass of red wine in 13 years after conservatorship ends

Reporter Juju Chang asks: "But things have gotten complicated?", to which Jamie Lynn replies, "I guess so."

Britney Spears' younger sister Jamie Lynn Spears has been named a trustee of the singer's fortune. (Getty Images)
Jamie Lynn Spears has opened up about her relationship with sister Britney Spears. (Getty Images)

Chang also asks the Sweet Magnolias star, "What has caused this rift between you?"

And referring to Jamie Lynn's new memoir entitled Things I Should Have Said, she asks: "What do you regret not saying?"

In August 2020, court documents revealed Jamie Lynn had been named as a trustee to protect the singer’s fortune.

Britney has been enjoying her new found freedom since her court-ordered conservatorship was finally ended after 13 years, celebrating being able to drive a car and drink red wine again.

DISNEY CHANNEL PRESENTS THE 2017 RADIO DISNEY MUSIC AWARDS - Entertainment's brightest young stars turned out for the 2017 Radio Disney Music Awards (RDMA), music's biggest event for families, at Microsoft Theater in Los Angeles on Saturday, April 29. 'Disney Channel Presents the 2017 Radio Disney Music Awards' airs Sunday, April 30 (7:00 p.m. EDT). (Image Group LA/Disney Channel via Getty Images)
Jamie Lynn Spears with her sister Britney in 2017. (Getty Images)

Last summer Jamie Lynn finally broke her silences about Britney's conservatorship with a video posted on social media.

She said: "The only reason I haven't before is because I felt like until my sister is able to speak for herself and say what she felt she needed to say publicly, that it wasn't my place and it wasn't the right thing to do."

Jamie Lynn added: "My sister knows I love and support her. That's the only person I owe anything to. I am not my family. I am my own person."

Britney has hinted she would like to do a tell-all interview with Oprah Winfrey about "all the bad things" she was subjected to during her conservatorship.

Sam Asghari said recent documentaries about Britney Spears haven't got everything right. (Steve Granitz/WireImage)
Britney Spears is now engaged to marry dancer Sam Asghari. (Getty Images)

She told her 36.4 million Instagram followers: "It still blows my mind every day I wake up how my family and the conservatorship were able to do what they did to me it was demoralising and degrading!!!!

Read more: Britney Spears teases new music as she says she will be her own 'cheerleader'

"I’m not even mentioning all the bad things they did to me which they should all be in jail for … yes including my church going mother!!!!"

Watch: Britney Spears unfollows Jamie Lynn Spears on Instagram