1: Tom Selleck plays Frank Reagan in Blue Bloods.

2: Frank Reagan is the patriarch of the Reagan family.

3: Blue Bloods cast members celebrate Tom Selleck's 79th birthday.

4: Selleck's portrayal of Reagan has won him critical acclaim.

5: Frank Reagan is known for his tough, fair leadership style.

6: Blue Bloods fans admire Selleck's performance as Reagan.

7: Selleck brings depth and gravitas to the role of Frank Reagan.

8: Tom Selleck's portrayal of Frank Reagan is iconic.

9: As Tom Selleck celebrates his 79th birthday, fans praise his work on Blue Bloods.

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