The phrase "serious and committed" is correct and usable in written English.
You can use it to describe someone who is dedicated and earnest in their efforts or responsibilities.
Example: "The team members are serious and committed to achieving their goals."
Alternatives: "dedicated and focused" or "earnest and devoted."
"These people really are serious and committed".
Some were quite serious and committed and some were not.
"He's very serious and committed to remedy any injustice that has been done".
The children who participated were all, without exception, serious and committed.
He is a favorite in Washington and London, regarded as more serious and committed to government than many others in the royal family.
Beals recalled Maliki as intensely serious and committed, even though he knew that the Americans had given the council little real power.
Could it be that Marx and Engels, while possessing human foibles, were serious intellectuals and committed revolutionaries who analyzed, critiqued and advocated solutions to political and social problems in their time?
This is a serious, intelligent and committed performance from Grant, however without some of the champagne-fizz of his comic stuff with Richard Curtis: and you can be mature without jettisoning the gags.
Speaking in the Scottish parliament for the first time since Scotland rejected independence, Mr Salmond said 16 and 17-year-olds had shown themselves to be "serious, passionate and committed citizens" in the referendum and there was an "overwhelming, unanswerable" case for giving them the vote in all future elections in Scotland and across the UK.
"David is very serious and very committed," Baumgartner added.
Seeing Made in Dagenham reminded me that in 1987 I reviewed a more serious and politically committed film about labour relations, Lezli-An Barrett's Business as Usual, where Glenda Jackson leads a strike in a Liverpool boutique.
