President Joe Biden was in "good spirits" and resumed his duties Friday after temporarily transferring power to Vice President Kamala Harris while undergoing a routine colonoscopy, according to White House Press Secretary Jen Psaki. 

The president spoke with Harris and chief of staff Ron Klain at approximately 11:35 a.m., Psaki said in a statement, and resumed his duties at that time. Biden underwent the procedure during a routine physical at Walter Reed Medical Center, where he'll complete the remainder of his medical exam before returning to the White House Friday afternoon. 

Biden's physical was not listed on his public schedule and was announced just hours before he traveled to the hospital in Bethesda, Md. 

As required by the 25th Amendment in the Constitution, Biden sent a letter to Sen. Patrick Leahy, D-Vt., president pro tempore of the Senate, and House Speaker Nancy Pelosi, D-Calif., stating that he was unable to discharge his duties while under anesthesia, temporarily transferring power to Harris.

Harris was in charge as President for 90 minutes.

(With input from agencies)