Los Angeles Lakers superstar LeBron James is still in disbelief that his eldest son, Bronny James, is already 21 years old. Bronny celebrated his birthday on Monday, with "The King" pouring his heart out with a long message for his son on Instagram. James shared two videos on his Instagram reels of a young Bronny playing basketball. The four-time NBA champion is so proud of what his son has accomplished in his young life. He also encouraged him to keep it going and remain hungry for success. "Man o man where do I start! These 2 videos simply speak for themselves. From day 1 you’ve always set out goals and have accomplished them because you’ve always been driven! To be able to witness it throughout your journey has been nothing short of amazing! Can’t believe you’re 21 years old man! A Young 🤴🏾, A Young MAN!! Keep inspiring, keep leading the next generation and most important keep being YOU!! HAPPY BIRTHDAY BRONNY! LOVE YOU MAN!! 🤎🤎🤎🤎✨✨✨✨💪🏾," James wrote. View this post on Instagram Instagram PostLeBron James is set to team up with Bronny James once again this upcoming NBA season. It will be his record-breaking 23rd year in the league, while the younger James is looking to get more minutes in his second season.However, Bronny's preseason is off to a horrendous start. He shot 1-for-12 in his preseason debut against the Phoenix Suns. He had a better game shooting the ball the following game versus the Golden State Warriors, but he committed five turnovers. LeBron James teases his second decision in new videoLeBron James teases his second decision in new video. (Photo: IMAGN)In a post on his social media accounts on Monday, LeBron James announced "The Second Decision," which he called the decision of all decisions for Oct. 7. James is going back to "The Decision" back in 2010 for this one, when he announced that he's taking his talents to South Beach and joining the Miami Heat.Fans began to speculate that it could be about his retirement, especially since he only has one year left on his contract with the LA Lakers. He's still at the top of his game, but some people looked at how happy he looked during the offseason chilling and playing golf. However, ClutchPoints' Brett Siegel calmed things down when he reported that Oct. 7 is the same date as Prime Date, and James has a big deal with Amazon. "For those wondering, LeBron James has a big deal with Amazon, and Prime Day starts tomorrow. Not a coincidence," Siegel tweeted.Brett Siegel @BrettSiegelNBALINKFor those wondering, LeBron James has a big deal with Amazon, and Prime Day starts tomorrow. Not a coincidence.It will be interesting to see if James will announce his farewell tour or just a promotion for Amazon.