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Kirani James at age 17

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Before They Were Superstars

Before They Were Superstars

Season 1
40 Episodes
Usain Bolt at 17

Before They Were Superstars

Ep 1 Usain Bolt at 17
The Williams Sisters at age 11 and 12

Before They Were Superstars

Ep 2 The Williams Sisters at age 11 and 12
Michael Phelps at 18

Before They Were Superstars

Ep 3 Michael Phelps at 18
Kirani James at age 17

Before They Were Superstars

Ep 4 Kirani James at age 17
Alex Ovechkin at age 18

Before They Were Superstars

Ep 5 Alex Ovechkin at age 18
Patty Mills at age 18

Before They Were Superstars

Ep 6 Patty Mills at age 18
Emily Seebohm at age 14

Before They Were Superstars

Ep 7 Emily Seebohm at age 14
Nastia Liukin at age 16

Before They Were Superstars

Ep 8 Nastia Liukin at age 16
Rafael Nadal at age 16

Before They Were Superstars

Ep 9 Rafael Nadal at age 16
Allyson Felix at age 17

Before They Were Superstars

Ep 10 Allyson Felix at age 17
Roger Federer at age 19

Before They Were Superstars

Ep 11 Roger Federer at age 19
Alina Kabaeva at age 17

Before They Were Superstars

Ep 12 Alina Kabaeva at age 17
Victoria Pendleton at age 26

Before They Were Superstars

Ep 13 Victoria Pendleton at age 26
Tom Daley at age 14

Before They Were Superstars

Ep 14 Tom Daley at age 14
Yao Ming at age 18

Before They Were Superstars

Ep 15 Yao Ming at age 18
Veronica Campbell-Brown at age 18

Before They Were Superstars

Ep 16 Veronica Campbell-Brown at age 18
Neymar at age 17

Before They Were Superstars

Ep 17 Neymar at age 17
Mariana Pajon at age 17

Before They Were Superstars

Ep 18 Mariana Pajon at age 17
Yelena Isinbaeva at age 16

Before They Were Superstars

Ep 19 Yelena Isinbaeva at age 16
Saina Nehwal at age 19

Before They Were Superstars

Ep 20 Saina Nehwal at age 19
Kohei Uchimura at age 21

Before They Were Superstars

Ep 21 Kohei Uchimura at age 21
Candace Parker at age 20

Before They Were Superstars

Ep 22 Candace Parker at age 20
Carolina Kluft at age 17

Before They Were Superstars

Ep 23 Carolina Kluft at age 17
Julia Mancuso at age 19

Before They Were Superstars

Ep 24 Julia Mancuso at age 19
Sarah Sjostrom at age 17

Before They Were Superstars

Ep 25 Sarah Sjostrom at age 17
Ai Fukuhara at age 16

Before They Were Superstars

Ep 26 Ai Fukuhara at age 16
Lydia Ko at age 15

Before They Were Superstars

Ep 27 Lydia Ko at age 15
Mutaz Barshim at age 19

Before They Were Superstars

Ep 28 Mutaz Barshim at age 19
Martina Sablikova at age 19

Before They Were Superstars

Ep 29 Martina Sablikova at age 19
Caroline Wozniacki at age 16

Before They Were Superstars

Ep 30 Caroline Wozniacki at age 16
Adelina Sotnikova at age 17

Before They Were Superstars

Ep 31 Adelina Sotnikova at age 17
Katie Taylor at age 21

Before They Were Superstars

Ep 32 Katie Taylor at age 21
Majlinda Kelmendi at age 19

Before They Were Superstars

Ep 33 Majlinda Kelmendi at age 19
Ty Walker at age 14

Before They Were Superstars

Ep 34 Ty Walker at age 14
Rafaela Silva at age 21

Before They Were Superstars

Ep 35 Rafaela Silva at age 21
Julius Yego at age 24

Before They Were Superstars

Ep 36 Julius Yego at age 24
Liu Xiang at age 20

Before They Were Superstars

Ep 37 Liu Xiang at age 20
Valerie Adams at age 21

Before They Were Superstars

Ep 38 Valerie Adams at age 21
Novak Djokovic at age 21

Before They Were Superstars

Ep 39 Novak Djokovic at age 21
Jessica Ennis-Hill at age 23

Before They Were Superstars

Ep 40 Jessica Ennis-Hill at age 23

Michael Phelps at 18

A trip back to Baltimore to see Michael Phelps reveal his brutal training regime shows why the swimming legend has 23 Olympic gold medals.