Thousands of people have been waiting outside the Toyota Centre in anticipation of the President’s arrival.
Some of those who are waiting have been in line for over a day.
While some people have come from nearby suburbs, others have come from cities as far afield as Dallas.
Trump is expected to deliver an hour-long speech.
This will be the President’s only rally in Texas before heading to Wisconsin later this week.
Follow below for live updates. All times in BST.
12.30am update: Ted Cruz greets Senator Ted Cruz at airport
Donald Trump was greeted at the airport by Texas Senator Ted Cruz.
The US President is set to deliver a speech alongside Senator Cruz ahead of the crunch midterm elections in November, in which Mr Cruz is seeking re-election.
12:45am update: Ted Cruz takes the stage ahead of Donald Trump
Senator Cruz attacked the Democratic party as well as his opponent Beto O’Rourke.
The Senator added that he was proud to have worked with the President to help Texas.
He said that Texas has been doing better than in years.
12:54am update: Ted Cruz discusses immigration
Senator Cruz attacked his opponent for his policies on immigration.
He calls Mr O’Rourke’s policies “not Texas”.
Mr Cruz called for the US to “build the wall”.
12:58am update: Donald Trump arrives at the Rally
Senator Ted Cruz introduced the President to the crowd.
The President entered the centre to the song of “God Bess the USA”.
The crowd greets Trump with applause and chants “USA”.
1:02am update: Trump calls Ted Cruz a ‘good friend’
Trump says that no one has helped him more with tax cuts and other policy than Ted Cruz.
The President added that Mr Cruz defends peoples’ “freedom”.
1:05am update: New tax cuts for the middle class next week
Trump says that next week there will be a new bill for tax cuts for the middle class.
He adds that he has done more with regulation than any other president in less than two years.
1:06am update: Trump claims that the wall is being built
Trump attacks “the caravan” that is coming from the southern border to the US. Calls it an “assault on our country”.
He said: “We need a wall build fast.”