Forbes is out with its annual list of the wealthiest celebrities in the US, and the top four are billionaires. The two people tied for the No. 5 spot with net worths of $900 million each, however, are both notable: Kylie Jenner is on track to become the youngest self-made billionaire ever, and Jay-Z's net worth is up $90 million from 2017, making him the biggest gainer on this year's list. The top six and their net worths: 
 -  George Lucas, $5.4 billion
-  Steven Spielberg, $3.7 billion
-  Oprah Winfrey, $2.8 billion
-  Michael Jordan, $1.7 billion
-  (tie) Kylie Jenner, $900 million
-  (tie) Jay-Z, $900 million
 Click for the 
full top 10. (For the first time in 24 years, 
a new No. 1 on the Forbes 400.)