JILL Duggar's husband Derick Dillard said the "past seven years have been extremely trying" as he thanked his wife for making the "bearable."
The 32-year-old took to Instagram to celebrate Jill's 30th birthday on Monday.
Alongside a snap of Jill smiling in front of gold balloons that said "30," Derick wrote: "Happy 30th birthday to my beautiful bride, @jillmdillard.
"These past 7 years have been extremely trying, but navigating life with my best friend has not only made it more bearable but also exciting and adventurous.
"Your Christ-like attitude continues to inspire and challenge me to be more like our Savior, Jesus Christ.
"You are an amazing wife and mother."
He concluded: "Thank you for who you are and all the sacrifices you constantly make for our family! I love you, and I know our boys love you too!"
In addition to the photo of Jill celebrating her birthday, the post also included snaps of Jill with their two sons and a photo of the couple kissing at Derick's recent law school graduation.
Jill and Derick tied the knot in 2014, while they share six-year-old son Israel and three-year-old son Samuel.
The couple are known as the rebels of the Duggar family, while they have distanced themselves from Jill's parents Jim Bob, 55, and Michelle, 54, in recent years.
The fallout is believed to have happened because rebel Jill hasn't been adhering to family's strict rules.
The former Counting On star often goes against the traditional views the rest of her devout independent Christian Baptist family believes in, including taking pride in living conservatively.
Jill often shares snaps of her wearing clothes – such as shorts and dresses that are not in-keeping with the religion's ideas of dressing demurely.
Additionally, both Jill and Derick have also engaged in behaviors such as drinking and sending their children to public school.
Derick's sweet tribute to Jill comes just weeks after her older brother Josh was arrested on child porn charges on April 29.
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The 33-year-old was granted bail after "possessing 65 images of child porn."
Despite Josh's release, the TLC star has restricted travel and cannot leave Benton, Washington, and Madison counties in Arkansas without permission from the court.
His wife Anna is currently six months pregnant with their seventh child, and he has been required to live away from the family as he is not allowed to be around minor children.
While the oldest Duggar child has "unlimited access" to his six children with Anna, he can no longer spend time around his siblings, nieces and nephews.