Julie Bowen felt “terrified” when she joined the cast of ‘Modern Family’. The 54-year-old actress – who has twins John and Gus, 13, and Oliver, 15, with her ex-husband Scott Phillips – eventually won two Emmys for her role as Claire Dunphy in the ABC sitcom but because she had made her name starring in dramas like ‘ER’ and ‘Boston Legal’, felt as if she “didn’t belong”, especially as she had recently become a mother. Speaking on the ‘I Choose Me’ podcast, she told former 90210′ star Jennie Garth: “I had babies, and I was breastfeeding, and I was going to work at 5 AM. I had three kids in diape…