Matthew McConaughey and Jennifer Garner play onscreen love interests in the romantic comedy 'Ghosts of Girlfriends Past,' and now they are sharing with ET how they bonded over parenthood while shooting the movie.

Matthew is dad to baby Levi, 9 months, with girlfriend Camila Alves, while Jen just had her second child, Seraphina, in January with hubby Ben Affleck.

Also in the video, Matthew and Jennifer talk about some of their worst past fashion faux pas and we surprise Jennifer with a special birthday gift.

In 'Ghosts of Girlfriends Past,' in theaters May 1, Matt plays confirmed bachelor and ladies man Connor Mead, who has left copious amounts of broken hearts in his wake. Jennifer plays Jenny, Connor's childhood friend and the one who always seemed immune to his charms.

On the eve of his brother's wedding, Connor gets a wake-up call from the ghost of his Uncle Wayne (Michael Douglas), who walks the shameless player on a comical tour through the ghosts of girlfriends past, present and future. Will Connor realize the consequences of his actions and find true love?