Caitlyn Jenner is arguably the star signing for this year's Celebrity, reportedly getting £ 500,000 to head to the forest.
Here's all you need to know about Olympic gold medalists who have participated in the US version of the show …
Famous for: Winning men's decathlon at the 1976 Olympics before the transition, starring Keeping Up with the Kardashians
Phobias: "There is nothing like everyone, insects make me dirty ”
Who is Caitlyn Jenner?
Born Bruce Jenner, this athlete became a household name after winning Gold in the Decathlon Men at the 1976 Olympics in Montreal.
At the time, Jenner was considered "the greatest athlete in the world" and "an all-American hero". Since then he has built a career in television and modeling.
Jenner's most prominent television role is in the reality show E! Keeping Up The Kardashians, where he starred with third wife Kris Jenner, stepchildren Kourtney, Kimberly, Khloe and Robert, and the daughters of Kendall and Kylie.
After getting divorced from Kris in 2014, Caitlyn no longer appeared so prominently in Keeping Up with The Kardashians, after getting her own reality series, I Am Cait, in 2015.
Other TV appearances have been included as contestants on The Weakest Link in 2002, cameo on Celebrity Apprentice in 2005, and even a small part of Murder, She Wrote.
When was the Caitlyn Jenner transition?
Born as a man, Jenner confirmed in April 2015 that she was a trans woman, having experienced gender dysphoria since childhood.
"For all intents and purposes, I am a woman," Jenner told Diane Sawyer in an interview with ABC.
In July of that year, Jenner spoke to Vanity Fair to discuss further details about his transition, and revealed that his new name was Caitlyn.
He tweeted: "I am very happy after a long struggle to live my real life. Welcome to the world of Caitlyn. Can't wait for you to know him / me. "
In 2017, Jenner underwent genital replacement surgery.
"I grew up to be Caitlyn," he told ABC News. "It's hard to be Bruce and be a man for 65 years, and then, all night, everything changes."
Has Caitlyn Jenner ever done me a celebrity before?
Although this is the first time Down Under for the English version, Jenner is no stranger to the jungle, having appeared in the American version wearing the I Celebrity shirt … Get Me Out of Here!
Even though he might not win the show (the honor was given to actor and choreographer Cris Judd), Jenner had a fair stab at the competition, coming in fourth.
Can Jenner take the crown in his second attempt?
What did Caitlyn Jenner say about doing I Celebrity?
"Dealing with others is by far the most difficult thing," Jenner admitted. "This is far more difficult than dealing with the most poisonous snake in the world. That's easy – stay away from them!
"You can't break away from other people and it will be a very different experience for me. Last time, I did it with a group of people from America that I knew. This time a group of people from England that I potentially wouldn't know …"
However, he said that he was a big fan of England and aimed to win fans both in the camp and among the public.
"I love going to England, I love British people and I hope to get some new friends, new allies and get through it all.
"I hope the British love me! I will go to the Forest with a good attitude and a good sense of humor. "