Jimmy Kimmel has decided to take a week off from hosting Jimmy Kimmel Live! The dad of four will be spending time with his youngest son, William John "Billy" Kimmel after he underwent a second open heart surgery.

Jimmy Kimmel's Son Undergoes Surgery

ABC network announced on Monday that Billy's surgery has finally pushed through last weekend and it was successful. Initially, Billy's operation was scheduled for the last week of October, but it was postponed due to the common cold.

"As a precautionary measure, the scheduled second heart surgery for Jimmy Kimmel's son Billy had to be postponed this week due to the common cold," read the statement.

Kimmel and Molly McNearney's 7-month-old son was diagnosed with tetralogy of Fallot with pulmonary atresia after he was born. Three days later, he had to undergo his first open heart surgery at Children's Hospital Los Angeles.

Following the successful surgery, Kimmel revealed that his son would still need to undergo two more surgeries in the future.

Chris Pratt Hosts 'Jimmy Kimmel Live!'

Meanwhile, Kimmel has once again invited some "celebrity Samaritans" to replace him as host of Jimmy Kimmel Live!  this week. On Monday, Chris Pratt graced the late night talk show and he interviewed Margot Robbie.

During his opening monologue, Pratt admitted that he's nervous about being Kimmel's replacement. Anna Faris' ex-husband also said that he's not used to what he's about to do because he has never hosted anything before.

Pratt performed the hit song, "Time of My Life," with country singer, Chris Stapleton. The duo hilariously tried to recreate a scene from Dirty Dancing where Baby (Jennifer Grey) ran to Johnny (Patrick Swayze) from across the room and he lifted her.

Unfortunately, Pratt had a hard time carrying Stapleton. The two ended up using a green screen that made it look like the actor was lifting the singer effortlessly.

Pratt also had a conversation with Robbie, who said that she started working at a restaurant in Australia at age 10. The Suicide Squad star also shared that she worked at a local bar at the age of 14.

The Guardians of the Galaxy actor asked Robbie if working at a young age was legal in her home country. Robbie said that it wasn't, but for some reason, she managed to get away with it.

On Tuesday, Jimmy Kimmel Live! will be hosted by Tracee Ellis Ross. Neil Patrick Harris will headline the talk show on Wednesday. Melissa McCarthy will replace Kimmel on Thursday.