Spencer was born in Dallas, Texas, and graduated from Plano East Senior High School in Plano, Texas in June 2010.
Boldman's first major acting role was playing Adam, the eldest of the bionic teenagers, on the Disney XD series Lab Rats which premiered in 2012. The same year he had a role in the film 21 Jump Street. In 2013 he was cast in the Disney Channel Original Movie Zapped, opposite Zendaya. In 2015, Boldman was cast opposite Emily Ratajkowski in the romance film Cruisewhich is set during the 1980s; the film was released in 2018.
|2012||21 Jump Street||French Samuels|
|2014||Cowgirls 'n Angels: Dakota's Summer||Bryce|
|2009||iCarly||Nate||Episode: "iSpeed Date"|
|2009||Jack and Janet Save the Planet||Jack||Unsold television pilot|
|2010–2011||I'm in the Band||Bryce Johnson||3 episodes|
|2012–2016||Lab Rats||Adam Davenport||Main role|
|2013||Jessie||Ted Hoover||Episode: "Break-Up and Shape-Up"|
|2014||Zapped||Jackson||Disney Channel Original Movie|