Cara Hilton won the seat last week in a by-election triggered by the resignation of disgraced former MSP Bill Walker, who is in jail for a string of domestic abuse offences.
Ms Hilton overcame the SNP challenge and took the constituency with a majority of 2,873 after polls closed on Thursday night.
She was pictured with her children - Luca, three; Sofia, five; and Louis, nine - who were at the parliament to see their mother take her seat. Dunfermline is now the second safest Labour seat at Holyrood, behind Dumfriesshire.
Picture: Gordon Terris