Hilary Duff and Sister Haylie's Daughters Are Too Adorable in Matching Onesies Hilary Duff Shares Adorable Photo of Her Son Cradling His 4-Week-Old Baby Sister on Thanksgiving The 'Really Special ...

Over the years, the series' ever-changing cast included Ashlee Simpson, Haylie Duff and future "Man of Steel" Tyler Hoechlin. See additional photos from the 7th Heaven via Mitchell's Instagram ...