The Argentine completed a £9.5 million permanent move to the Hammers earlier this week, and he celebrated by scoring a wonder goal in training.
The Argentine midfielder has impressed for the Hammers this season with some silky performances since joining the club on loan from UAE side Al Jazira last summer.
After scoring six goals in 22 appearances in all competitions the European challengers moved quickly to secure his signature on a permanent basis two months before his temporary deal was even due to expire.
Hammers legend Sir Trevor Brooking claimed yesterday that the ability to attract players such as Lanzini and Dimitri Payet on long-term deals shows the club's increased ambition and power as they look to break into the Premier League top four.
And it is no wonder that Irons fans can barely contain their excitement at securing the future of the 23-year-old as, judging by a video posted by West Ham's Twitter account on Thursday, they have a seriously talented player on their hands.
Filmed during training, the midfielder received a pass in the penalty area with a fine first touch, turned his marker inside out and, with the ball going away from goal, sent a superb rabona effort sneaking off the inside of the post into the bottom corner.
West Ham United FC (@whufc_official) March 24, 2016
Lanzini has already shown the skill he boasts in his locker on the Premier League stage this season, scoring spectacular goals against Everton and Tottenham Hotspur.
With players such as him and Payet in their side, the Hammers may yet be hosting Champions League football in their first season at the Olympic Stadium next campaign.
Slaven Bilic's side are currently fifth in the Premier League table, just a single point behind Manchester City as they look to qualify for Europe's premier competition for the first time in their history.