Congrats to the happy couple!

Colin Farrell's girlfriend, Alicja Bachleda, gave birth to a son - named Henry Tadeusz Farrell - on October 7th, and had the first pic of the couple after the birth!

Check out the twosome leaving the U2 concert at the Rose Bowl on October 25th above...

The 33-year-old actor already has 6-year-old son James with model Kim Bordenave.