Kellyanne Conway said on CNN Wednesday that the two had a 'wonderful conversation.'
It was not clear if they discussed the Utah Senate race. Romney has been considering a 2018 run in Utah if Sen. Orrin Hatch retires. Trump has encouraged Hatch, 83, to seek another term.
Conway wouldn't say if Trump would support Romney in a potential Senate bid.
Romney fiercely criticized Trump during the presidential campaign.
Trump's former chief strategist Steve Bannon assailed Romney during a Tuesday rally for Alabama Senate candidate Roy Moore. Bannon attacked Romney as a 'draft dodger.' Romney received a draft deferment for his missionary work in France.