<Li> Molly Parker as Maureen Robinson, a fearless and brilliant aerospace engineer taking her family on the mission to colonize Alpha Centauri for a new life on a better world . She is a mission commander . She is married to John Robinson and is the mother of three children . </Li> <Li> Toby Stephens as John Robinson, a former U.S. Navy SEAL, and husband to Maureen . He is the biological father of Maureen's two youngest children . </Li> <Li> Maxwell Jenkins as Will Robinson, the 11 - year - old son and youngest child of Maureen and John Robinson . </Li> <Li> Taylor Russell as Judy Robinson, Maureen's 18 - year - old biracial daughter and eldest child . She is a mission doctor, having received accelerated medical training . </Li>

Who plays will in netflix lost in space