Pregnant Bindi Irwin shares a heartfelt tribute to her brother Robert on his 17th birthday

Pregnant Bindi Irwin shares a heartfelt tribute to her brother Robert on his 17th birthday and says he will be a ‘fun uncle’ to her daughter one day

Bindi Irwin is more than halfway through her pregnancy.

And on Tuesday, the 22-year-old wildlife warrior shared a heartfelt tribute to her younger brother, Robert, on his 17th birthday.

The mother-to-be shared photos from her wedding to Chandler Powell at Australia Zoo earlier this year, which showed Robert walking her down aisle.

‘Happy Birthday to my amazing brother!’ Pregnant Bindi Irwin shared a heartfelt birthday tribute to brother Robert in an Instagram post on Tuesday. She shared photos from her wedding day showing them walking down aisle 

‘Happy birthday to my amazing brother! Your kind heart and fantastic sense of humour makes my every day,’ she wrote in the caption.  

‘Our baby girl is going to love her “funcle” (fun uncle) so very much.’

‘You’re one of the brightest lights the world has ever seen. I’ll always be here for you. Love you!’ she concluded.

Special day! The 22-year-old also posted a photo of them sharing a hug and wrote: 'Happy Birthday to my amazing brother! Your kind heart and fantastic sense of humour makes my every day'

Special day! The 22-year-old also posted a photo of them sharing a hug and wrote: ‘Happy Birthday to my amazing brother! Your kind heart and fantastic sense of humour makes my every day’

Exciting times ahead: The mother-to-be added in the caption, 'Our baby girl is going to love her "funcle" (fun uncle) so very much'

Exciting times ahead: The mother-to-be added in the caption, ‘Our baby girl is going to love her “funcle” (fun uncle) so very much’

It comes after Bindi gave fans an update on her pregnancy last week as she shared ultrasound footage of her growing baby. 

‘Our beautiful daughter is the light of our lives. Beyond thankful that she chose us to be her parents. I can’t wait for her to be here next year,’ she wrote on Instagram on Friday.

The accompanying video showed Bindi lying back in an ultrasound room as the camera panned across to show her unborn child projected on the screen.

'I can't wait for her to be here next year': This comes after the wildlife warrior gave fans an update on her pregnancy as she shared ultrasound footage of her growing baby, on Friday

‘I can’t wait for her to be here next year’: This comes after the wildlife warrior gave fans an update on her pregnancy as she shared ultrasound footage of her growing baby, on Friday

'She is beautiful and very active': In the accompanying video, Bindi lies back in an ultrasound room as the camera pans across to show her unborn child projected on the screen. Her husband, Chandler, 24, can then be heard saying: 'Wow, you can see her heartbeat there'

‘She is beautiful and very active’: In the accompanying video, Bindi lies back in an ultrasound room as the camera pans across to show her unborn child projected on the screen. Her husband, Chandler, 24, can then be heard saying: ‘Wow, you can see her heartbeat there’

‘This is so exciting. Look at our daughter, she’s so beautiful,’ she said. 

Her husband, Chandler, 24, could then be heard saying: ‘Wow, you can see her heartbeat there. Oh my goodness, she is beautiful and very active.’

The daughter of the late conservationist Steve ‘The Crocodile Hunter’ Irwin has just passed the 20-week mark of her first pregnancy.

She announced she was pregnant in August, just five months after marrying Chandler in a makeshift ceremony at Australia Zoo in March. 

Little Wildlife Warrior on the way! The young couple announced Bindi's pregnancy back in August

Little Wildlife Warrior on the way! The young couple announced Bindi’s pregnancy back in August