Robert Irwin has sent a heartfelt birthday message to his TV partner Julia Morris.

The famed celebrity zookeeper shared a gallery of delightful pictures which featured the 21-year-old posing alongside his I’m a Celebrity…Get Me out of Here co-host.

Robert, seemingly unable to keep a straight face, can be seen laughing as Julia, who turned 57 on April 20, tries to keep him laughing.

‘Happy birthday to you Lady Julia Morris,’ Robert said in the Instagram post on Sunday.

‘Thank you for being my I’m a Celebrity co-host, comedic Miyagi, and friend. Most of the pictures we have look very much like these Me trying (and failing) to keep a straight face between laughing. Have a great day!’

Julia was quick to send a reply, telling the hunky fan favourite, ‘Love you and making you laugh is actually a massive joy in my life, J x.’

Robert Irwin has sent a heartfelt birthday message to his TV partner Julia Morris. The famed celebrity zookeeper shared a gallery of delightful pictures which featured the 21-year-old posing alongside his I’m a Celebrity …Get Me out of Here co-host. Both pictured

The pictures, which appear to be be shot in a studio, feature Julia dressed in an elegant flowing emerald gown with a long train.

Robert, meanwhile, flaunts his slim figure in tight grey trousers and an old school knit top.

Several photos features Robert wrapping the train around him self while Julia pulls a face.

Robert and Julia were teamed on the hit survival reality show for the first time in 2024 after long time co-host Chris Brown left the series the year before.

Morris had been hosting Channel Ten‘s I’m A Celebrity… Get Me Out of Here! Australia since 2015.

Last year, it was claimed that Julia feels she is being ‘overshadowed’ by new co-host Robert on the popular reality series.

A TV insider told Daily Mail Australia, Julia, 57, has been feeling pressure to ‘keep up’ with 21-year-old Robert’s natural banter.

‘While the viewers have celebrated the arrival of Robert Irwin as host, Julia is feeling fatigued by the pressure to match his natural energy,’ an on-set source said.

Robert and Julia were teamed on the hit survival reality show for the first time in 2024 after long time co-host Chris Brown left the series the year before. Pictured: Julia, who turned 57 on Sunday, April 20, on the IACGMOH set with Robert

‘It is like when you agree to babysit your friend’s kid and you pretend you love it until you don’t. You tell their parents you love their child like it’s your own but secretly you would love a wine and to put the kid to bed.’

‘That is where Julia is at and there are executives trying to avoid this coming across on camera.’

The insider claimed producers made Julia and Robert spend two weeks together prior to filming to build their chemistry but she is ‘struggling’.

‘Julia is running on empty and is struggling to keep up. Maybe having them live in each other’s pockets like that wasn’t such a good thing after all. It is now obvious it was unsustainable,’ they added.

The source said Julia has had her ‘fair share of experience in comedy’ but not as much as Robert who ‘performs all day at Australia Zoo’.

‘Robert genuinely is used to performing to multiple crowds a day at Australia Zoo,’ the insider added.

‘It is in his DNA to be engaging everyone in the back row and that kind of experience from such a young age has him doing laps around the usual shtick from Julia.’

Robert is reportedly paving his own way with his role on I’m A Celebrity and ‘couldn’t be more popular at the moment.’

Last year, it was claimed that Julia feels she is being ‘overshadowed’ by new co-host Robert on the popular reality series