He looks exactly like Arnold

Arnold Schwarzenegger's son Joseph Baena is turning 16 today ... and he's getting the perfect gift from his dad -- A COMPLETE HOME GYM ... TMZ has learned.

In case you haven't noticed, Joseph is a behemoth -- a virtual carbon copy of a very young Austrian immigrant ... and Arnold clearly feels the apple may not fall far from the gigantic redwood tree.

Although Joseph lives with his mom in Bakersfield ... we've learned Arnold has established a very close relationship with the boy. They talk regularly on the phone and Arnold has flown him to several premieres.

As one source put it, "Once the truth came out, Arnold embraced Joseph. Since then, they've been slowly building a great relationship."

FYI -- Arnold started pumping iron around the time he was 16 and he quickly blew up to become Mr. Universe. So, current Mr. Bakersfield ... watch your back!

Read more: http://www.tmz.com/2013/1...z2ib6WDubQ

The love child of Arnold Schwarzenegger and his former maid is looking more and more like his muscly father everyday, having shed the puppy fat and bulked up whilst training for his high school swim team.

Joseph Baena was seen leaving his school swimming pool on Tuesday, showing off his bulging biceps and toned torso in a Batman vest as he walked with his mother Mildred, the day before his 16th birthday

And although he shares the Latino look of his mother, Joseph seems to have inherited the chiseled jawline of his action star father.

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[img:$uid]http://ll-media.tmz.com/2013/10/02/1002-joseph-baena-inf-5.jpg[/img:$uid]

[img:$uid]http://i.dailymail.co.uk/i/pix/2013/10/02/article-0-18734CD300000578-915_634x700.jpg[/img:$uid]

[Edited 10/23/13 18:14pm]

BobGeorge909 said:

I hope she was hot at some point.

I heard that apparently he's narcissistic or something and enjoyed her company because he was the better looking one of the two.
Or something like that.

BobGeorge909 said:

I hope she was hot at some point.

The oldest photo i could find

[img:$uid]http://i.dailymail.co.uk/i/pix/2011/06/01/article-1392988-0C5A54ED00000578-524_306x423.jpg[/img:$uid]