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Neil Patrick Harris and partner David Burtka posed with their 2-year-old twins Harper and Gideon at the ‘Smurf 2’ premiere in Los Angeles Sunday.

The ‘How I Met Your Mother’ actor was a live action actor in the flick that is slated to hit theaters July 31, 2013.

Also hitting the red carpet was Katy Perry, who provided the voice for Smurfette. She was accompanied to the high profile event by her beloved grandmother.

Britney Spears contributed an original song titled ‘Ooh La La’ to the film and sound track. She was on hand for the festivities with her sons Sean, 7 and Jayden, 6. Both boys will celebrate a birthday in September.

Check out Brit and her handsome kids in our feature gallery below:

Photos: WENN, Twitter