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Kristen Bell, Tom Arnold

Jesse Grant/Tibrina Hobson/Getty Images

It's impossible to compare the cuteness of babies, right?

Well, don't tell that to new mom Kristen Bell.

The 32-year-old actress took to Twitter yesterday for some harmless joking involving her 2-week-old daughter Lincoln and Tom Arnold's 1-week-old son Jax.

"@TomArnold your baby is so much cuter than ours," Bell posted. "big deal. i can admit the facts."

Arnold later replied, "But yours is so much more mature."

We're sure both bundles of joy are too cute for words!