"So excited to start my new adventure with the brilliant team at the Young and Restless," Buchanan tweeted on Tuesday morning.
Buchanan starred on the Australian soap opera Home and Away as Pat Jenkins. He also played Charley Prince in Blue Water High. His other TV credits include Pretty Little Liars, NCIS: Los Angeles, Jessie, Hung and Castle. His film credits include Newcastle and Behaving Badly.
Buchanan reports to work at The Young and the Restless on January 27 and will first air on February 25.