The Philadelphia 76ers have locked up one of the NBA's top young stars - and in the process have created their own version of a Big Three.

All-Star guard Tyrese Maxey agreed to a five-year, $204million maximum contract extension with the 76ers on Monday, according to Adrian Wojnarowski.

The deal was reported hours after Philadelphia and nine-time All-Star Paul George agreed to a reported four-year, $212million maximum contract.

With 2022-23 NBA MVP Joel Embiid, Maxey and George teaming up together, the 76ers will be looking to overtake the Eastern Conference from the reigning NBA champion Boston Celtics.

Maxey, 23, is coming off a breakout year in his fourth pro season, averaging career highs of 25.9 points, 6.2 assists and 3.7 rebounds while being named to his first All-Star team. He ranked 10th in the NBA in 3-pointers made per game with an average of 3.0 and was named the league's Most Improved Player.

He stepped up his game in this year's play-offs, averaging 29.8 points, 6.8 assists and 5.2 rebounds while shooting 40.0 per cent from 3-point range, but the 76ers were eliminated in the first round by the New York Knicks in six games.

The Sixers have been one of the NBA's top teams during the regular season over the last several years, but have been unable to get over the hump in the play-offs.

The team has reached the play-offs in seven straight years but has failed to advance beyond the second round during that period.

Over the last seven seasons, Philadelphia has the NBA's fourth-highest winning percentage during the regular season (.625), but unlike the three teams that have achieved better records in that span - the Milwaukee Bucks (.656), Celtics (.650) and Denver Nuggets (.632) - the 76ers are without an NBA title.

While the Celtics are still the team to beat in the East, the 76ers' chances of dethroning them have seemingly improved with their recent signings.