The 39-year-old country music star hopes the former couple, whose divorce was finalised last month just hours after they announced their separation, can still remain close.
He told E! News: ''Going through a divorce is tough and I just hope they are at peace with whatever they need to be at peace with. And I know they tweeted each other a couple of times which is a step in the right direction for them.''
The pair sparked rumours they had reconciled after they enjoyed a playful exchange on Twitter recently, but a source later insisted they have no plans to get back together.
The insider said: ''This was not a deliberate plan to show some kind of unified front.
''There are no hard feelings. They want to move on as friends, and they are doing just that.''
The duo announced they are divorcing after four years of marriage in July in a joint statement, saying: ''This is not the future we envisioned and it is with heavy hearts that we move forward separately.''
The 'Voice' USA mentor Blake returned to work on the NBC series this week and showed no signs of a broken heart.
A source previously said he appears to have ''moved on from Miranda and is just over it.''
Take a look back at October's inaugural event.
The film is expected to continue without Mendes' involvement.