Manni Costello

I'm walking 35km to cure mito



Support Manni's 50km Challenge to Cure Mito for my cousin Mielle!

I'm walking 50km from 1st - 10th August in The Bloody Long Virtual Walk to help my cousin Mielle and other Australians living with mitochondrial disease.

Mielle is my favourite cousin and the best cousin anyone could ever ask for! She is always giving me hugs and "never letting go". We are best friends and look like we could be twins. 

Mito robs the body’s cells of energy, causing multiple organ dysfunction or failure. It can affect anyone at any age.

Please sponsor my walk to fund research into treatments and cures for this devastating disease.

Every dollar will make a difference!

My 50km walk will be bloody tough, but with your support, I know I can do it.


My Achievements

Thank you to my Sponsors


Ian Dale

Manni, great effort to exceed your target. Well done Pa Dale


Carlene Costello

Cousins supporting cousins love Poppy & Cardi


Will Manning

Great work Manni!


Melinda Wright



Hi lil buddy!


Steve Church

Your a legend Manni! Just like your old man!! Love all the Costello’s x


Gianella Family

Go Manni! We are barracking for you in Switzerland 🇨🇭 So proud of you and all that you are doing. Mielle is a lucky girl to have you in her life ❤️


Rebecca Nakhle

Well done Manni! Such a thoughtful act for your cousin and all people with Mito. Very proud of you xx


Gordon And Jan Mckendry

Great job Manni. Mielle is lucky to have such lovely caring cousins.


Lauren Mitchell

So proud of you Manni! You can do this! Love Aunty Lauren and Uncle Chris xo


Jacqui Culevski


Elizabeth Fawcett

Proud of you. Good luck


Parker’s Cellar

Well done Manni!


Amber & Dan

Awesome Manni! You can do it Buddy xx Love Uncle Dan & Aunty Amber


Mum And Dad

We are so proud of you Manni. You are an incredible cousin to Mielle and we love you both so very much! You can do it buddy!


Melanie, Ben, Frankie & Jax

Best wishes for the big walk Mani! We are very proud of you, such a wonderful cause, you are making a difference. Love the Corlis-Bentley’s xx


Victoria And Jerry Vaughan

Great effort, well done, Auntie Victoria and Uncle Jerry


Sean Lottman

Way to go Manni! This is such a great thing to do for your cousin!


Bianca Kunstler

Go Manni !! 💫


Auntie Takako


Jean & Colin Howells

Great effort very proud of you. Love from Aunty Jean & Uncle Colin xx


Lara Birch

Go Manni ❤️


James Nancarrow


Alexis Fawcett

Great work guys


Michelle Galper

Manni You are an amazing cousin to Mielle and she tells me too that you are her favourite. Well done and have fun Michelle (Jaime’s mum) we met last year in Fiji


Marsha Sharpe

Go Manni!!!


Gideon Gee

Champion effort Manni. And best wishes to Mielle!


All Rosie Promotions

Go Dieggo!!!


Suz, Pete, Olivia, Maeve Murphy

Way to go Manni!!!


Katherine Dally-watkins

What a fantastic achievement. Well done Manni


Benji N Gabi

Manni, you rock!! keep up the good walk!


Elise Mittelheuser

Aarrgghhsome effort Manni. What a role model you are to other young people to volunteer your time and raise funds to help others in need. Inspirational


Eastern Suburbs Concierge - Nicola Wilson


Mielle Dale

I love you more


Lisa Langston

Well done Manni. Love the Langston's xx


Shasa Carthew

We’re cheering you on Manni and very proud of you! Lots of love from Shasa & Aunty Cam! xo


Mark Fawcett

Go Manni


Maissa Alameddine

Bloody awesome Manni!


Claudia Stanford

Go, Manni!! Great work 👍🏻👍🏻👍🏻


Clare Le Roy

Great job Manni! Keep going and tell Mielle hello from her old friend Caleb.


Lynda Tremellen

Way to go Manni, such an amazing thing to do for your beautiful cousin! I bet you're her favourite too :)


Justine Keenan


Dalziel Family

Good on you Manni - you are the best cousin too


Remi Heller

You’re an inspiration, Manni!


Terry & Kerry Davis

A great cause, good luck.


Kelly Paljusic

Well done Manni, you are awesome! Love Edie and Sylvie Paljusic x


Bill And Heather

Well done Manni. Great to see you doing your bit!


Simon Taffs

Good on you buddy!


Karla Beasley

Well done Manni! You’re a great kid and an exceptional cousin.


Rebecca Della-franca

Well done Manni x


Susan Jones

What a thoughtful cousin you are. Your family must be so proud of you. Go, go, go Manni, we are supporting you all the way


Oliver Melis

Well done Manni!


Alisa Shtabskaia


Zara Mitchell

Good luck Manni! Sending you all my love and kisses Zara


Tex Costello

Great job Manni! It's been so fun to walk with you for some of your walks. I hope we can keep walking to school and I also loved walking with you and Mielle by the beach.


Bailey Mitchell

Go Manni! I hope you get there. Love Bailey