Jen Arnold of ‘The Little Couple’ Has Cancer

'The Little Couple' star Jen Arnold revealed Friday she has cancer.

The 39-year-old who attained fame on the hit TLC show issued a statement to Us Magazine saying that she has been diagnosed with a rare cancer and is undergoing treatment.

"I have recently been diagnosed with a rare type of cancer and am currently undergoing treatment, including surgery and chemotherapy. I am very fortunate as the prognosis is very good," the Huston-neonatologist said in a statement Friday. "While there is never a good time to get news like this; getting it just as we are building our new family is tough in many ways . . . but being surrounded by the love of my husband and our two beautiful children is actually in many ways giving me the strength to fight it even stronger," she said. However, she did not reveal the type of cancer.

Jen is married to Bill Klein, 38. The couple are parents to a three-year-old adopted son Will and two-year-old daughter, Zoey.

In an interview with PEOPLE magazine she said that she was fortunate to have her family with her in such bad times. "I am very fortunate as the prognosis is good. While there is never a good time to get news like this, getting it just as we are building our new family is tough in many ways ... But being surrounded by the love of my husband and our two beautiful children is actually in many ways giving me the strength to fight it even stronger." 

Jen and Bill shot to fame after their show, 'The Little Couple: Just Married.' The show garnered them a huge fan base. The couple fought all odds in their lives and even faced fertility and surrogacy issues.

"For a lot of people, loss tears them apart," Arnold told PEOPLE earlier this year. "In general, we are pretty tough people. I feel very lucky and fortunate to have the wonderful life I have. We are good at putting things in perspective because of our life experiences. I am not a person to give up when something is important. We feel so lucky to be parents."