Angelina Jolie makes Brad Pitt feel ''complete''.

The 'Killing Them Softly' actor raises six kids - Maddox, 11, Pax, eight, Zahara, seven, Shiloh, six, and four-year-old twins Knox and Vivienne - with his actress fiancée and has told friends he has never been happier than he is now.

A source told the US Edition of OK! magazine: ''Brad and Angie have found a fulfilment with each other that they've never had before. She's spurred him on to greater things in his career and opened his world up to the joys of fatherhood. He's admitted to pals he has never felt so complete.''

Friends also believe Angelina's recent mastectomy, which she had after discovering she carried the BRCA1 mutated gene and meant it was highly likely she would get breast cancer, has brought them closer together.

The insider added: ''They've overcome some enormous hurdles like Angie's recent life-saving double mastectomy but it's given them a new appreciation for their amazing family life.''