Booker will make his first All-Star game in his fifth National Basketball Association season, becoming the Suns' first All-Star since Steve Nash in the 2011-12 season.
Booker was chosen by Commissioner Adam Silver, who makes the final call on injury replacements to the All-Star rosters.
Booker and Lillard both play for Western Conference teams.
Lillard also noted that he hoped Booker or "someone like that" would fill his spot. Traditionally he has selected the next highest player in the coach's All-Star reserve voting (we do not know who that is, the coaches votes are not public).
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Through 52 games this season, Booker's averaging 26.4 points with a 55% effective field-goal percentage along with 6.3 assists and 4.2 rebounds.
This is what Booker said when asked about how he would change the selection process: "Put the best players in the game".
Booker will certainly come off the bench for Team LeBron together with Nikola Jokic, Chris Paul, Domantas Sabonis, Ben Simmons, Jayson Tatum and also Russell Westbrook.
I've been a sports fan since 1991 after I watched Michael Jordan play for the first time and a sports writer for over 10 years. The 23-year old, now in his fifth season, had never earned All Star honors until this year, and it took an injury for him to get the nod.