Amidst a rumor that Bruce Jenner is transition into a woman, a source reports that his entire family is supportive of the decision.

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On Sunday, People reported that even though some of his kids didn't know about his plans, his family is supportive of his decision to transition into a woman.

The publication claims that a source close to the family has confirmed that Jenner has been preparing to live life as a female.

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"There was a lot they didn't know about their dad," a source said of the younger Jenner and Kardashian children.

But they are all supportive of his alleged decision to undergo a sex change operation.

"The number one thing is they all support Bruce," the source said. "Kris Jenner has been great and anything that says the opposite just isn't true. It's really a hard adjustment for her and a shock but she 100% supports him -- the whole family does."

Over the past few months, speculation has increased that Jenner underwent a sex change operation, and a change in his appearance has increased the questioning.

In the last few weeks, Jenner has apparently been seen with different hairstyles and even French manicures.

It's rumored that he recently returned from Thailand which is where people think he had the operation.

According to InTouch Weekly, the 65-year-old reportedly agreed to film it for Keeping Up With The Kardashians, so fans of the show will know the truth.

The timing is certainly interesting, as the site points out that he underwent plastic surgery this time last year to shave down his trachea. It's also noted that this type of operation is typically performed on patients in the early stages of gender reassignment.

Tags: Bruce Jenner