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!’ Bindi Irwin shared a heartfelt tribute to her brother, Robert, on his 17th birthday on Tuesday, saying he will be a ‘fun uncle’ to her daughter one day

‘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 mother-to-be shared photos from her wedding to Chandler Powell at Australia Zoo earlier this year, which showed Robert walking her down aisle and hugging her at the altar

Special day: 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 and hugging her at the altar

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

Exciting times: The mother-to-be wrote 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': It comes after Bindi gave her Instagram followers an update on her pregnancy last week as she shared ultrasound footage of her growing baby

‘I can’t wait for her to be here next year’: It comes after Bindi gave her Instagram followers an update on her pregnancy last week as she shared ultrasound footage of her growing baby

'She is beautiful and very active': The accompanying video showed Bindi lying back in an ultrasound room as the camera panned across to show her child projected on the screen

‘She is beautiful and very active’: The accompanying video showed Bindi lying back in an ultrasound room as the camera panned across to show her child projected on the screen

‘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.

Bindi 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! Bindi announced she was pregnant in August, just five months after marrying Chandler (left) in a makeshift ceremony at Australia Zoo in March

Little wildlife warrior on the way! Bindi announced she was pregnant in August, just five months after marrying Chandler (left) in a makeshift ceremony at Australia Zoo in March