Justin Timberlake's son's first words are revealed! The 34-year-old singer shared several new pictures of Silas Randall Timberlake, his 5-month-old son with Jessica Biel, with Jimmy Fallon last Wednesday on "The Tonight Show." Later, he also tweeted them for fans to see, reported Eonline.

One of the pictures showed Silas smiling. He was looking straight into the camera as his dad holds him up. Another photo, taken after a bath, showed Jessica kissing Silas on the cheek as he was wrapped in an elephant towel.

A third photo showed Silas in Justin's lap. "We're watching the PGA championship," Justin said. He also joked that his mini-me is a great putter and they are working on his swing. In reality, Justin admitted, "He can't hold anything," Eonline wrote.

There weren't many pictures of Silas doing rounds on the internet. Since Silas' birth in April 2015, the Justin and Jessica have shared just two of photos of him on social media. The first picture came when he was just a few weeks old and wore a Memphis Grizzlies shirt. The second snapshot came on Father's Day, when he was in Justin's arms and wore a onesie embroidered with the words "I Love Dad," reported Eonline.

What did Justin have to say about fatherhood quizzed Jimmy on the show. "It's the great thing in the world, right?" Jimmy asked.

"I still have trouble wiping my own ass!" Justin joked. He then went on to say, "It is the most insanely, amazing, most beautiful, unbelievable thing that could ever happen to you."

After that Justin also revealed that Silas' first word was "da-da."

That must have just melted his heart.

Later on, Justin pimped his 901 Tequila brand and showed Jimmy how to make the perfect cocktail. And, of course, the funny pair also performed The History of Rap 6, Eonline reported.