She said: "I love it! Suri is doing really, really well. She's a beautiful little girl. I feel so honoured to be her mom, really."
Katie showed-off her amazing post-baby figure in a strapless champagne-coloured dress at a Giorgio Armani Prive fashion show in Beverly Hills.
When asked about losing her post-baby weight, she explained it was all down to "a lot of walking".
The 27-year-old actress - who is set to star alongside Queen Latifah in new comedy 'Mad Money' - also admitted she was nervous about juggling work and family commitments.
She said: "It'll be another challenge but I have a wonderful, supportive husband and family, and it's another project that we're going to handle together and that's part of the fun."
When asked about her new film role, she said: "I play a young girl who's part of three women who rob the Federal Reserve. It's a comedy."
Katie Holmes "loves" being a mother to her "beautiful little girl".
