Has Bruce Jenner undergone breast implant surgery in his biggest move towards becoming a woman?

Bruce Jenner has undergone breast implant surgery according to reports on Tuesday.

RadarOnline.com has claimed the reality star had silicone implants put in earlier this month.

'Bruce had silicone breast implants put in a few weeks ago,' Radar quoted an insider. 'He went with a smaller implant because he didn't want to look ridiculous.'

When MailOnline asked his representative about the report, he replied: 'No comment'.

One step close: Bruce Jenner, pictured in January, has undergone breast implant surgery according to reports on Tuesday

The 65-year-old has yet to officially confirm his transformation, but in recent months has been gradually changing his appearance to a more feminine form.

As well as growing his hair out an painting his nails, the former Olympian has already undergone a laryngeal shave procedure to flatten out his Adam's Apple, and has reportedly had rhinoplasty to sculpt his nose into a more feminine shape.

'Recovery hasn’t been that difficult, but Bruce has had to sleep in a recliner to help with the healing,' the source said.

'He’s not allowed to lift anything, and he has to wear a bra 24/7, but he’s expected to resume normal activities in the next six weeks.' 

Feminine: In February last year the 65-year-old had a laryngeal shave to reduce the size of his adam's apple

Transition: The former Olympian has undergone a number of physical alterations in recent months, including a reported nose job

Changes: How Bruce looked in 1993

'He has been emotional, but finally feels like this is the body he has meant to have,' they added.

The report claims Bruce's next step if full gender reassignment surgery, while he may also have further breast augmentation to gradually increase his cup size.

On Monday Bruce's son Burt jumped to his father's defence after Jamie Foxx made fun of him while hosting Sunday Night's iHeartRadio Music Awards.

Foxx was accused of transphobia in a Twitter backlash after his routine at the Shrine Auditorium saying: 'We have some groundbreaking performances here too tonight. We got Bruce Jenner, will be here doing some musical performances. He’s doing a his and her duet all by himself.'

The following day Burt slammed Foxx telling TMZ: 'I think he is just copying Kevin Hart because Kevin Hart is taking all his movie opportunities.' 

'The man is on a roll and Jamie Foxx is on the way down. He's gotta keep his mojo going so he's gotta copy what's working' 

The 36-year-old was referring to similar jibes Hart made during Comedy Central's Justin Bieber Roast, where 19-year-old Kendall Jenner was in attendance.