Although Carroll is still recovering from ankle surgery in April he passed a medical and Steve Bruce hopes to be able to involve him in a first-team game before next month's global break.
Whether Andy Carroll gets added to these new additions later today remains to be seen, but Carroll's free transfer status means that any deal could still be completed after today's 5pm transfer deadline.
"To bring a local hero like Andy back to Newcastle is fantastic", Bruce said.
The former England global came through the club's academy and went on to make 90 appearances for Newcastle across all competitions, scoring 33 goals and claiming 21 assists. "My friends and family are here, and it's the club that I support - it is home", Carroll said of his return. I left on a high.
The 30-year-old striker, who came through the Newcastle United academy, played five seasons at his hometown club, scoring 33 goals in 91 appearances. It's been a pretty tough time since then.
Jack Colback has nearly certainly played his last game for Newcastle United after being axed from Steve Bruce's 25-man Premier League squad. "He gives us something different and we'll do our best to get him flying again".
His progression continued apace in the top flight with his 11 goals by Boxing Day, which included a hat-trick against Aston Villa, prompting Liverpool to swoop on the final day of the winter transfer window in January 2011 with an offer Newcastle simply could not refuse.
Carroll will join club-record signing Joelinton to bolster the club's attack, while French winger Allan Saint-Maximin has also arrived at St. James' Park from Patrick Viera's OGC Nice.
Newcastle begin their 2019/20 Premier League campaign at home to Arsenal on Sunday.
Carroll's sentimental return back home should please some Newcastle fans, but only time will tell how much time he will actually get.